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security advisoryUbuntuimportantUbuntu 24.04 LTS Linux Kernel Important Escalation Threat USN-8393-1
Several security issues were fixed in the Linux kernel.. ========================================================================== Ubuntu Security Notice USN-8393-1 June 04, 2026 linux-azure-fips vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 24.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-azure-fips: Linux kernel for Microsoft Azure Cloud systems with FIPS Details: It was discovered that the Linux kernel algif_aead module did not properly handle in-place cryptographic operations. This flaw is known as Copy Fail. A local attacker could use this to escalate privileges, or possibly escape a container. (CVE-2026-31431) It was discovered that the Linux kernel did not properly handle shared page fragments during socket buffer operations, collectively known as Dirty Frag. A logic flaw existed in the XFRM ESP-in-TCP subsystem and in the RxRPC networking subsystem when processing paged fragments. A local attacker could use this to escalate privileges, or possibly escape a container. (CVE-2026-43284, CVE-2026-43500, CVE-2026-45998, CVE-2026-46000) It was discovered that a logic flaw existed in the XFRM ESP-in-TCP subsystem in the Linux kernel when handling socket buffer fragments. This flaw is known as Fragnesia. A local attacker could use this to escalate privileges, or possibly escape a container. (CVE-2026-43503, CVE-2026-46300) Qualys discovered that a race condition existed in the ptrace subsystem of the Linux kernel when privileged processes are exiting. An unprivileged local attacker could use this issue to expose sensitive information. (CVE-2026-46333) Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contain a memory leak when handling AppArmor notifications. A local attacker could use this to cause resource exhaustion. (CVE-2026-47326) Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and7.0 contain a NULL pointer dereference when handling AppArmor notifications. A local attacker could use this to cause a kernel oops. (CVE-2026-47327) Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained an invalid free when handling AppArmor notifications. A local attacker could use this to corrupt kernel memory. (CVE-2026-47328) Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained insufficient validation of AppArmor notification responses. A local attacker could use this to allow crafted responses to be processed. (CVE-2026-47329) Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 used an uninitialized variable when handling AppArmor notifications. A local attacker could use this to cause incorrect caching of data. (CVE-2026-47330) Tristan Madani discovered that Ubuntu Linux kernel 6.8 contained a use- after-free (UAF) bug. A local attacker could use this to cause memory corruption and, theoretically, arbitrary code execution. (CVE-2026-47331) Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained an out-of-bounds (OOB) read when handling AppArmor notifications. A local attacker could use this to cause information disclosure of kernel memory. (CVE-2026-47332) Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained a out-of-bounds (OOB) read when handling AppArmor notifications. A local attacker could use this to cause kernel memory corruption and, theoretically, influence processing of AppArmor policies. (CVE-2026-47333) Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained incorrect holding of locks when handling AppArmor notifications. A local attacker could use this to cause a kernel panic or deadlock. (CVE-2026-47334) Tristan Madani discovered that Ubuntu Linux kernel 6.8 contained a NULL pointer dereference when handling AppArmor notifications. A local attacker could use this to cause a kernel panic. (CVE-2026-47335) Tristan Madani discovered that UbuntuLinux kernel 6.8 used an uninitialized variable when handling AppArmor AF_INET/AF_INET6 socket mediation. A local attacker could use this to influence processing of fine- grained network socket mediation. (CVE-2026-47336) Tristan Madani and Trevor Lawrence have each independently discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained a NULL pointer dereference when handling AppArmor network socket mediation. A local attacker could use this to cause a kernel oops. (CVE-2026-47337) Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - ARM64 architecture; - x86 architecture; - Cryptographic API; - Compute Acceleration Framework; - Drivers core; - Null block device driver; - Ublk userspace block driver; - Bluetooth drivers; - Counter interface drivers; - DMA engine subsystem; - DPLL subsystem; - GPU drivers; - HID subsystem; - Intel Trace Hub HW tracing drivers; - IIO ADC drivers; - IIO subsystem; - On-Chip Interconnect management framework; - IRQ chip drivers; - Modular ISDN driver; - LED subsystem; - Multiple devices driver; - UACCE accelerator framework; - MMC subsystem; - Ethernet bonding driver; - Network drivers; - Mellanox network drivers; - NVME drivers; - PHY drivers; - x86 platform drivers; - i.MX PM domains; - SCSI subsystem; - SLIMbus drivers; - SPI subsystem; - TCM subsystem; - W1 Dallas's 1-wire bus driver; - Xen hypervisor drivers; - BTRFS file system; - EFI Variable file system; - exFAT file system; - Ext4 file system; - HFS+ file system; - Network file system (NFS) client; - Network file system (NFS) server daemon; - NTFS3 file system; - SMB network file system; - Scheduler infrastructure; - Netfilter; - NFC subsystem; - Tracing infrastructure; - io_uring subsystem; - BPF subsystem; - Perf events; -Floating proportions library; - Memory management; - Bluetooth subsystem; - CAN network layer; - Ceph Core library; - Networking core; - IPv4 networking; - IPv6 networking; - L2TP protocol; - MAC80211 subsystem; - NET/ROM layer; - Packet sockets; - RDS protocol; - RxRPC session sockets; - Network traffic control; - SCTP protocol; - TLS protocol; - Unix domain sockets; - VMware vSockets driver; - Wireless networking; - ALSA AC97 driver; - Generic PCM loopback sound driver; - Creative Sound Blaster X-Fi driver; - AMD SoC Alsa drivers; - Texas InstrumentS Audio (ASoC/HDA) drivers; - USB sound devices; - KVM subsystem; (CVE-2024-50004, CVE-2024-58096, CVE-2024-58097, CVE-2025-37926, CVE-2025-38201, CVE-2025-38591, CVE-2025-40039, CVE-2025-40082, CVE-2025-40149, CVE-2025-68351, CVE-2025-68358, CVE-2025-68365, CVE-2025-68725, CVE-2025-68749, CVE-2025-68803, CVE-2025-68823, CVE-2025-71160, CVE-2025-71162, CVE-2025-71163, CVE-2025-71180, CVE-2025-71182, CVE-2025-71183, CVE-2025-71184, CVE-2025-71185, CVE-2025-71186, CVE-2025-71188, CVE-2025-71189, CVE-2025-71190, CVE-2025-71191, CVE-2025-71192, CVE-2025-71193, CVE-2025-71194, CVE-2025-71195, CVE-2025-71196, CVE-2025-71197, CVE-2025-71198, CVE-2025-71199, CVE-2025-71200, CVE-2025-71220, CVE-2025-71222, CVE-2025-71224, CVE-2025-71225, CVE-2025-71268, CVE-2026-22976, CVE-2026-22977, CVE-2026-22978, CVE-2026-22979, CVE-2026-22980, CVE-2026-22982, CVE-2026-22984, CVE-2026-22990, CVE-2026-22991, CVE-2026-22992, CVE-2026-22994, CVE-2026-22996, CVE-2026-22997, CVE-2026-22998, CVE-2026-22999, CVE-2026-23000, CVE-2026-23001, CVE-2026-23003, CVE-2026-23005, CVE-2026-23006, CVE-2026-23010, CVE-2026-23011, CVE-2026-23019, CVE-2026-23020, CVE-2026-23021, CVE-2026-23025, CVE-2026-23026, CVE-2026-23030, CVE-2026-23031, CVE-2026-23032, CVE-2026-23033, CVE-2026-23035, CVE-2026-23037, CVE-2026-23038, CVE-2026-23047, CVE-2026-23049, CVE-2026-23050, CVE-2026-23053, CVE-2026-23054, CVE-2026-23056,CVE-2026-23057, CVE-2026-23058, CVE-2026-23059, CVE-2026-23061, CVE-2026-23062, CVE-2026-23063, CVE-2026-23064, CVE-2026-23065, CVE-2026-23068, CVE-2026-23069, CVE-2026-23071, CVE-2026-23073, CVE-2026-23075, CVE-2026-23076, CVE-2026-23078, CVE-2026-23080, CVE-2026-23083, CVE-2026-23084, CVE-2026-23085, CVE-2026-23086, CVE-2026-23087, CVE-2026-23088, CVE-2026-23089, CVE-2026-23090, CVE-2026-23091, CVE-2026-23093, CVE-2026-23094, CVE-2026-23095, CVE-2026-23096, CVE-2026-23097, CVE-2026-23098, CVE-2026-23099, CVE-2026-23101, CVE-2026-23102, CVE-2026-23103, CVE-2026-23105, CVE-2026-23107, CVE-2026-23108, CVE-2026-23110, CVE-2026-23113, CVE-2026-23116, CVE-2026-23119, CVE-2026-23120, CVE-2026-23121, CVE-2026-23123, CVE-2026-23124, CVE-2026-23125, CVE-2026-23126, CVE-2026-23128, CVE-2026-23129, CVE-2026-23131, CVE-2026-23133, CVE-2026-23135, CVE-2026-23136, CVE-2026-23139, CVE-2026-23140, CVE-2026-23141, CVE-2026-23142, CVE-2026-23144, CVE-2026-23145, CVE-2026-23146, CVE-2026-23148, CVE-2026-23150, CVE-2026-23151, CVE-2026-23156, CVE-2026-23159, CVE-2026-23160, CVE-2026-23163, CVE-2026-23164, CVE-2026-23166, CVE-2026-23167, CVE-2026-23168, CVE-2026-23170, CVE-2026-23172, CVE-2026-23173, CVE-2026-23176, CVE-2026-23178, CVE-2026-23179, CVE-2026-23180, CVE-2026-23182, CVE-2026-23187, CVE-2026-23190, CVE-2026-23191, CVE-2026-23193, CVE-2026-23198, CVE-2026-23200, CVE-2026-23202, CVE-2026-23204, CVE-2026-23205, CVE-2026-23206, CVE-2026-23212, CVE-2026-23213, CVE-2026-23214, CVE-2026-23215, CVE-2026-23216, CVE-2026-23254, CVE-2026-23256, CVE-2026-23257, CVE-2026-23258, CVE-2026-23260, CVE-2026-23261, CVE-2026-23262, CVE-2026-23264, CVE-2026-23274, CVE-2026-23351, CVE-2026-23394, CVE-2026-31419, CVE-2026-31504, CVE-2026-31533, CVE-2026-31676, CVE-2026-43033, CVE-2026-43077, CVE-2026-43078, CVE-2026-43494, CVE-2026-46028) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 24.04 LTS linux-image-6.8.0-1059-azure-fips 6.8.0-1059.65+fips1 Available with Ubuntu Pro linux-image-azure-fips 6.8.0-1059.65+fips1 Available with Ubuntu Pro linux-image-azure-fips-6.8 6.8.0-1059.65+fips1 Available with Ubuntu Pro After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References: https://ubuntu.com/security/notices/USN-8393-1 CVE-2024-50004, CVE-2024-58096, CVE-2024-58097, CVE-2025-37926, CVE-2025-38201, CVE-2025-38591, CVE-2025-40039, CVE-2025-40082, CVE-2025-40149, CVE-2025-68351, CVE-2025-68358, CVE-2025-68365, CVE-2025-68725, CVE-2025-68749, CVE-2025-68803, CVE-2025-68823, CVE-2025-71160, CVE-2025-71162, CVE-2025-71163, CVE-2025-71180, CVE-2025-71182, CVE-2025-71183, CVE-2025-71184, CVE-2025-71185, CVE-2025-71186, CVE-2025-71188, CVE-2025-71189, CVE-2025-71190, CVE-2025-71191, CVE-2025-71192, CVE-2025-71193, CVE-2025-71194, CVE-2025-71195, CVE-2025-71196, CVE-2025-71197, CVE-2025-71198, CVE-2025-71199, CVE-2025-71200, CVE-2025-71220, CVE-2025-71222, CVE-2025-71224, CVE-2025-71225, CVE-2025-71268, CVE-2026-22976, CVE-2026-22977, CVE-2026-22978, CVE-2026-22979, CVE-2026-22980, CVE-2026-22982, CVE-2026-22984, CVE-2026-22990, CVE-2026-22991, CVE-2026-22992, CVE-2026-22994, CVE-2026-22996, CVE-2026-22997, CVE-2026-22998, CVE-2026-22999, CVE-2026-23000, CVE-2026-23001, CVE-2026-23003, CVE-2026-23005, CVE-2026-23006, CVE-2026-23010, CVE-2026-23011, CVE-2026-23019, CVE-2026-23020, CVE-2026-23021, CVE-2026-23025, CVE-2026-23026, CVE-2026-23030,CVE-2026-23031, CVE-2026-23032, CVE-2026-23033, CVE-2026-23035, CVE-2026-23037, CVE-2026-23038, CVE-2026-23047, CVE-2026-23049, CVE-2026-23050, CVE-2026-23053, CVE-2026-23054, CVE-2026-23056, CVE-2026-23057, CVE-2026-23058, CVE-2026-23059, CVE-2026-23061, CVE-2026-23062, CVE-2026-23063, CVE-2026-23064, CVE-2026-23065, CVE-2026-23068, CVE-2026-23069, CVE-2026-23071, CVE-2026-23073, CVE-2026-23075, CVE-2026-23076, CVE-2026-23078, CVE-2026-23080, CVE-2026-23083, CVE-2026-23084, CVE-2026-23085, CVE-2026-23086, CVE-2026-23087, CVE-2026-23088, CVE-2026-23089, CVE-2026-23090, CVE-2026-23091, CVE-2026-23093, CVE-2026-23094, CVE-2026-23095, CVE-2026-23096, CVE-2026-23097, CVE-2026-23098, CVE-2026-23099, CVE-2026-23101, CVE-2026-23102, CVE-2026-23103, CVE-2026-23105, CVE-2026-23107, CVE-2026-23108, CVE-2026-23110, CVE-2026-23113, CVE-2026-23116, CVE-2026-23119, CVE-2026-23120, CVE-2026-23121, CVE-2026-23123, CVE-2026-23124, CVE-2026-23125, CVE-2026-23126, CVE-2026-23128, CVE-2026-23129, CVE-2026-23131, CVE-2026-23133, CVE-2026-23135, CVE-2026-23136, CVE-2026-23139, CVE-2026-23140, CVE-2026-23141, CVE-2026-23142, CVE-2026-23144, CVE-2026-23145, CVE-2026-23146, CVE-2026-23148, CVE-2026-23150, CVE-2026-23151, CVE-2026-23156, CVE-2026-23159, CVE-2026-23160, CVE-2026-23163, CVE-2026-23164, CVE-2026-23166, CVE-2026-23167, CVE-2026-23168, CVE-2026-23170, CVE-2026-23172, CVE-2026-23173, CVE-2026-23176, CVE-2026-23178, CVE-2026-23179, CVE-2026-23180, CVE-2026-23182, CVE-2026-23187, CVE-2026-23190, CVE-2026-23191, CVE-2026-23193, CVE-2026-23198, CVE-2026-23200, CVE-2026-23202, CVE-2026-23204, CVE-2026-23205, CVE-2026-23206, CVE-2026-23212, CVE-2026-23213, CVE-2026-23214, CVE-2026-23215, CVE-2026-23216, CVE-2026-23254, CVE-2026-23256, CVE-2026-23257, CVE-2026-23258, CVE-2026-23260, CVE-2026-23261, CVE-2026-23262, CVE-2026-23264, CVE-2026-23274, CVE-2026-23351, CVE-2026-23394, CVE-2026-31419, CVE-2026-31431, CVE-2026-31504, CVE-2026-31533,CVE-2026-31676, CVE-2026-43033, CVE-2026-43077, CVE-2026-43078, CVE-2026-43284, CVE-2026-43494, CVE-2026-43500, CVE-2026-43503, CVE-2026-45998, CVE-2026-46000, CVE-2026-46028, CVE-2026-46300, CVE-2026-46333, CVE-2026-47326, CVE-2026-47327, CVE-2026-47328, CVE-2026-47329, CVE-2026-47330, CVE-2026-47331, CVE-2026-47332, CVE-2026-47333, CVE-2026-47334, CVE-2026-47335, CVE-2026-47336, CVE-2026-47337 Package Information: https://launchpad.net/ubuntu/+source/linux-azure-fips/6.8.0-1059.65+fips1 . Explore Ubuntu 24.04 LTS security advisory USN-8393-1 regarding Linux kernel issues for enhanced protection.. Linux kernel security, Ubuntu security update, privilege escalation, Azure FIPS kernel issues. . Severity: Important. LinuxSecurity.com Team
Jun 04, 2026 •Important Ubuntu 172
security advisorycriticalUbuntuUbuntu 16.04 LTS linux-fips Critical Risk Compromise CVE-2026-31504
The system could be compromised under certain conditions.. ========================================================================== Ubuntu Security Notice USN-8361-2 June 04, 2026 linux-fips vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 16.04 LTS Summary: The system could be compromised under certain conditions. Software Description: - linux-fips: Linux kernel with FIPS Details: A security issue was discovered in the Linux kernel. An attacker could possibly use this to compromise the system. This update corrects flaws in the following subsystem: - Packet sockets; (CVE-2026-31504) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 LTS linux-image-4.4.0-1125-fips 4.4.0-1125.132 Available with Ubuntu Pro linux-image-fips 4.4.0.1125.127 Available with Ubuntu Pro After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References: https://ubuntu.com/security/notices/USN-8361-2 https://ubuntu.com/security/notices/USN-8361-1 CVE-2026-31504 Package Information: https://launchpad.net/ubuntu/+source/linux-fips/4.4.0-1125.132 . Critical update for Ubuntu 16.04 LTS addressing a potential attack via the linux-fips kernel. Immediate action needed.. Linux Kernel Update Ubuntu FIPS Attack. . Severity: Critical. LinuxSecurity.com Team
Jun 04, 2026 •Critical Ubuntu 
172
security advisorycriticalUbuntuUbuntu 18.04 LTS Linux Kernel Security Flaw Privilege Escalation USN-8392-1
Several security issues were fixed in the Linux kernel.. ========================================================================== Ubuntu Security Notice USN-8392-1 June 04, 2026 linux-aws-5.4, linux-hwe-5.4 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 18.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-aws-5.4: Linux kernel for Amazon Web Services (AWS) systems - linux-hwe-5.4: Linux hardware enablement (HWE) kernel Details: It was discovered that the Linux kernel algif_aead module did not properly handle in-place cryptographic operations. This flaw is known as Copy Fail. A local attacker could use this to escalate privileges, or possibly escape a container. (CVE-2026-31431) It was discovered that the Linux kernel did not properly handle shared page fragments during socket buffer operations, collectively known as Dirty Frag. A logic flaw existed in the XFRM ESP-in-TCP subsystem and in the RxRPC networking subsystem when processing paged fragments. A local attacker could use this to escalate privileges, or possibly escape a container. (CVE-2026-43284, CVE-2026-43500) Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - Cryptographic API; - Packet sockets; - RDS protocol; - TLS protocol; (CVE-2026-31504, CVE-2026-31533, CVE-2026-43033, CVE-2026-43077, CVE-2026-43078, CVE-2026-43494, CVE-2026-46028) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS linux-image-5.4.0-1160-aws 5.4.0-1160.170~18.04.1 Available with Ubuntu Pro linux-image-5.4.0-231-generic 5.4.0-231.251~18.04.1 Available with Ubuntu Pro linux-image-5.4.0-231-lowlatency 5.4.0-231.251~18.04.1 Available with Ubuntu Pro linux-image-aws 5.4.0.1160.170~18.04.1 Available with Ubuntu Pro linux-image-aws-5.4 5.4.0.1160.170~18.04.1 Available with Ubuntu Pro linux-image-generic-5.4 5.4.0.231.251~18.04.1 Available with Ubuntu Pro linux-image-generic-hwe-18.04 5.4.0.231.251~18.04.1 Available with Ubuntu Pro linux-image-lowlatency-5.4 5.4.0.231.251~18.04.1 Available with Ubuntu Pro linux-image-lowlatency-hwe-18.04 5.4.0.231.251~18.04.1 Available with Ubuntu Pro linux-image-oem 5.4.0.231.251~18.04.1 Available with Ubuntu Pro linux-image-oem-osp1 5.4.0.231.251~18.04.1 Available with Ubuntu Pro linux-image-snapdragon-5.4 5.4.0.231.251~18.04.1 Available with Ubuntu Pro linux-image-snapdragon-hwe-18.04 5.4.0.231.251~18.04.1 Available with Ubuntu Pro linux-image-virtual-5.4 5.4.0.231.251~18.04.1 Available with Ubuntu Pro linux-image-virtual-hwe-18.04 5.4.0.231.251~18.04.1 Available with Ubuntu Pro After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform thisas well. References: https://ubuntu.com/security/notices/USN-8392-1 CVE-2026-31431, CVE-2026-31504, CVE-2026-31533, CVE-2026-43033, CVE-2026-43077, CVE-2026-43078, CVE-2026-43284, CVE-2026-43494, CVE-2026-43500, CVE-2026-46028 . Critical updates to Ubuntu 18.04 LTS address multiple Linux kernel issues including privilege escalation threats.. Linux kernel, Ubuntu, AWS, security updates, privilege escalation. . Severity: Critical. LinuxSecurity.com Team
Jun 04, 2026 •Critical Ubuntu 172
security advisorycriticalprivilege escalationUbuntu 20.04 8391-1 Linux Kernel Critical Escalation Issues
Several security issues were fixed in the Linux kernel.. ========================================================================== Ubuntu Security Notice USN-8391-1 June 04, 2026 linux-raspi, linux-raspi-5.4 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-raspi: Linux kernel for Raspberry Pi systems - linux-raspi-5.4: Linux kernel for Raspberry Pi systems Details: It was discovered that the Linux kernel algif_aead module did not properly handle in-place cryptographic operations. This flaw is known as Copy Fail. A local attacker could use this to escalate privileges, or possibly escape a container. (CVE-2026-31431) It was discovered that the Linux kernel did not properly handle shared page fragments during socket buffer operations, collectively known as Dirty Frag. A logic flaw existed in the XFRM ESP-in-TCP subsystem and in the RxRPC networking subsystem when processing paged fragments. A local attacker could use this to escalate privileges, or possibly escape a container. (CVE-2026-43284, CVE-2026-43500) Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - Cryptographic API; - Network drivers; - NVME drivers; - IPv4 networking; - Packet sockets; - RDS protocol; - TLS protocol; (CVE-2024-50304, CVE-2026-23112, CVE-2026-23209, CVE-2026-31504, CVE-2026-31533, CVE-2026-43033, CVE-2026-43077, CVE-2026-43078, CVE-2026-43494, CVE-2026-46028) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS linux-image-5.4.0-1143-raspi 5.4.0-1143.156 Available with Ubuntu Pro linux-image-raspi 5.4.0.1143.174 Available with Ubuntu Pro linux-image-raspi-5.4 5.4.0.1143.174 Available with Ubuntu Pro linux-image-raspi2 5.4.0.1143.174 Available with Ubuntu Pro Ubuntu 18.04 LTS linux-image-5.4.0-1143-raspi 5.4.0-1143.156~18.04.1 Available with Ubuntu Pro linux-image-raspi-5.4 5.4.0.1143.156~18.04.1 Available with Ubuntu Pro linux-image-raspi-hwe-18.04 5.4.0.1143.156~18.04.1 Available with Ubuntu Pro After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References: https://ubuntu.com/security/notices/USN-8391-1 CVE-2024-50304, CVE-2026-23112, CVE-2026-23209, CVE-2026-31431, CVE-2026-31504, CVE-2026-31533, CVE-2026-43033, CVE-2026-43077, CVE-2026-43078, CVE-2026-43284, CVE-2026-43494, CVE-2026-43500, CVE-2026-46028 . Update your Ubuntu system to address critical Linux kernel issues affecting Raspberry Pi; prevent escalations and leaks.. Ubuntu security update, linux-raspi vulnerabilities, privilege escalation Linux kernel. . Severity: Critical. LinuxSecurity.com Team
Jun 04, 2026 •Critical Ubuntu 172
security advisorycriticalprivilege escalationUbuntu 18.04 LTS Linux Kernel Critical Privilege Escalation USN-8390-1
The system could be made to run programs as an administrator.. ========================================================================== Ubuntu Security Notice USN-8390-1 June 04, 2026 linux, linux-azure, linux-azure-4.15, linux-azure-fips, linux-fips, linux-gcp-4.15, linux-gcp-fips, linux-kvm, linux-oracle vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 18.04 LTS - Ubuntu 14.04 LTS Summary: The system could be made to run programs as an administrator. Software Description: - linux: Linux kernel - linux-azure-4.15: Linux kernel for Microsoft Azure Cloud systems - linux-azure-fips: Linux kernel for Microsoft Azure Cloud systems with FIPS - linux-fips: Linux kernel with FIPS - linux-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems - linux-gcp-fips: Linux kernel for Google Cloud Platform (GCP) systems with FIPS - linux-kvm: Linux kernel for cloud environments - linux-oracle: Linux kernel for Oracle Cloud systems - linux-azure: Linux kernel for Microsoft Azure Cloud systems Details: It was discovered that the Linux kernel did not properly handle shared page fragments during socket buffer operations, collectively known as Dirty Frag. A logic flaw existed in the XFRM ESP-in-TCP subsystem and in the RxRPC networking subsystem when processing paged fragments. A local attacker could use this to escalate privileges, or possibly escape a container. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS linux-image-4.15.0-1148-fips 4.15.0-1148.160 Available with Ubuntu Pro linux-image-4.15.0-1155-oracle 4.15.0-1155.166 Available with Ubuntu Pro linux-image-4.15.0-1175-kvm 4.15.0-1175.180 Available with Ubuntu Pro linux-image-4.15.0-1186-gcp 4.15.0-1186.203 Available with Ubuntu Pro linux-image-4.15.0-1202-azure 4.15.0-1202.217 Available with Ubuntu Pro linux-image-4.15.0-2094-gcp-fips 4.15.0-2094.100 Available with Ubuntu Pro linux-image-4.15.0-2111-azure-fips 4.15.0-2111.117 Available with Ubuntu Pro linux-image-4.15.0-251-generic 4.15.0-251.263 Available with Ubuntu Pro linux-image-4.15.0-251-lowlatency 4.15.0-251.263 Available with Ubuntu Pro linux-image-azure-4.15 4.15.0.1202.170 Available with Ubuntu Pro linux-image-azure-fips 4.15.0.2111.107 Available with Ubuntu Pro linux-image-azure-fips-4.15 4.15.0.2111.107 Available with Ubuntu Pro linux-image-azure-lts-18.04 4.15.0.1202.170 Available with Ubuntu Pro linux-image-fips 4.15.0.1148.145 Available with Ubuntu Pro linux-image-gcp-4.15 4.15.0.1186.199 Available with Ubuntu Pro linux-image-gcp-fips 4.15.0.2094.92 Available with Ubuntu Pro linux-image-gcp-fips-4.15 4.15.0.2094.92 Available with Ubuntu Pro linux-image-gcp-lts-18.04 4.15.0.1186.199 Available with Ubuntu Pro linux-image-generic 4.15.0.251.235 Available with Ubuntu Pro linux-image-kvm 4.15.0.1175.166 Available with Ubuntu Pro linux-image-lowlatency 4.15.0.251.235 Available with Ubuntu Pro linux-image-oracle-4.15 4.15.0.1155.160 Available withUbuntu Pro linux-image-oracle-lts-18.04 4.15.0.1155.160 Available with Ubuntu Pro linux-image-virtual 4.15.0.251.235 Available with Ubuntu Pro Ubuntu 14.04 LTS linux-image-4.15.0-1202-azure 4.15.0-1202.217~14.04.1 Available with Ubuntu Pro linux-image-azure 4.15.0.1202.217~14.04.1 Available with Ubuntu Pro After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References: https://ubuntu.com/security/notices/USN-8390-1 CVE-2026-43284 . Update for Ubuntu Linux kernel fixes critical issue allowing unauthorized program execution as admin.. Ubuntu Linux Kernel Privilege Escalation Security Patch. . Severity: Critical. LinuxSecurity.com Team
Jun 04, 2026 •Critical Ubuntu 172
security advisorymoderateUbuntuUbuntu 20.04 18.04 Kernel Moderate Escalation Risks USN-8389-1
Several security issues were fixed in the Linux kernel.. ========================================================================== Ubuntu Security Notice USN-8389-1 June 04, 2026 linux, linux-aws, linux-aws-fips, linux-azure, linux-azure-5.4, linux-azure-fips, linux-bluefield, linux-fips, linux-gcp, linux-gcp-5.4, linux-gcp-fips, linux-iot, linux-kvm, linux-oracle, linux-oracle-5.4, linux-xilinx-zynqmp vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux: Linux kernel - linux-aws: Linux kernel for Amazon Web Services (AWS) systems - linux-aws-fips: Linux kernel for Amazon Web Services (AWS) systems with FIPS - linux-azure: Linux kernel for Microsoft Azure Cloud systems - linux-azure-fips: Linux kernel for Microsoft Azure Cloud systems with FIPS - linux-bluefield: Linux kernel for NVIDIA BlueField platforms - linux-fips: Linux kernel with FIPS - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-gcp-fips: Linux kernel for Google Cloud Platform (GCP) systems with FIPS - linux-iot: Linux kernel for IoT platforms - linux-kvm: Linux kernel for cloud environments - linux-oracle: Linux kernel for Oracle Cloud systems - linux-xilinx-zynqmp: Linux kernel for Xilinx ZynqMP processors - linux-azure-5.4: Linux kernel for Microsoft Azure cloud systems - linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) systems - linux-oracle-5.4: Linux kernel for Oracle Cloud systems Details: It was discovered that the Linux kernel did not properly handle shared page fragments during socket buffer operations, collectively known as Dirty Frag. A logic flaw existed in the XFRM ESP-in-TCP subsystem and in the RxRPC networking subsystem when processing paged fragments. A local attacker could use this to escalate privileges, or possibly escape a container.(CVE-2026-43284, CVE-2026-43500) Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - RDS protocol; (CVE-2026-43494) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS linux-image-5.4.0-1064-iot 5.4.0-1064.67 Available with Ubuntu Pro linux-image-5.4.0-1078-xilinx-zynqmp 5.4.0-1078.82 Available with Ubuntu Pro linux-image-5.4.0-1119-bluefield 5.4.0-1119.126 Available with Ubuntu Pro linux-image-5.4.0-1134-fips 5.4.0-1134.144 Available with Ubuntu Pro linux-image-5.4.0-1147-kvm 5.4.0-1147.156 Available with Ubuntu Pro linux-image-5.4.0-1158-oracle 5.4.0-1158.168 Available with Ubuntu Pro linux-image-5.4.0-1160-aws 5.4.0-1160.170 Available with Ubuntu Pro linux-image-5.4.0-1160-aws-fips 5.4.0-1160.170+fips1 Available with Ubuntu Pro linux-image-5.4.0-1163-gcp 5.4.0-1163.172 Available with Ubuntu Pro linux-image-5.4.0-1163-gcp-fips 5.4.0-1163.172+fips1 Available with Ubuntu Pro linux-image-5.4.0-1164-azure 5.4.0-1164.170 Available with Ubuntu Pro linux-image-5.4.0-1164-azure-fips 5.4.0-1164.170+fips1 Available with Ubuntu Pro linux-image-5.4.0-231-generic 5.4.0-231.251 Available with Ubuntu Pro linux-image-5.4.0-231-generic-lpae 5.4.0-231.251 Available with Ubuntu Pro linux-image-5.4.0-231-lowlatency 5.4.0-231.251 Available with Ubuntu Pro linux-image-aws-5.4 5.4.0.1160.157 Available with Ubuntu Pro linux-image-aws-fips 5.4.0.1160.107 Available with Ubuntu Pro linux-image-aws-fips-5.4 5.4.0.1160.107 Available with Ubuntu Pro linux-image-aws-lts-20.04 5.4.0.1160.157 Available with Ubuntu Pro linux-image-azure-5.4 5.4.0.1164.156 Available with Ubuntu Pro linux-image-azure-fips 5.4.0.1164.100 Available with Ubuntu Pro linux-image-azure-fips-5.4 5.4.0.1164.100 Available with Ubuntu Pro linux-image-azure-lts-20.04 5.4.0.1164.156 Available with Ubuntu Pro linux-image-bluefield 5.4.0.1119.115 Available with Ubuntu Pro linux-image-bluefield-5.4 5.4.0.1119.115 Available with Ubuntu Pro linux-image-fips 5.4.0.1134.131 Available with Ubuntu Pro linux-image-fips-5.4 5.4.0.1134.131 Available with Ubuntu Pro linux-image-gcp-5.4 5.4.0.1163.165 Available with Ubuntu Pro linux-image-gcp-fips 5.4.0.1163.105 Available with Ubuntu Pro linux-image-gcp-fips-5.4 5.4.0.1163.105 Available with Ubuntu Pro linux-image-gcp-lts-20.04 5.4.0.1163.165 Available with Ubuntu Pro linux-image-generic 5.4.0.231.223 Available with Ubuntu Pro linux-image-generic-5.4 5.4.0.231.223 Available with Ubuntu Pro linux-image-generic-lpae 5.4.0.231.223 Available with Ubuntu Pro linux-image-generic-lpae-5.4 5.4.0.231.223 Available with Ubuntu Pro linux-image-kvm 5.4.0.1147.143 Available with Ubuntu Pro linux-image-kvm-5.4 5.4.0.1147.143 Available with Ubuntu Pro linux-image-lowlatency 5.4.0.231.223 Available with Ubuntu Pro linux-image-lowlatency-5.4 5.4.0.231.223 Available with Ubuntu Pro linux-image-oem 5.4.0.231.223 Available with Ubuntu Pro linux-image-oem-osp1 5.4.0.231.223 Available with Ubuntu Pro linux-image-oracle-5.4 5.4.0.1158.152 Available with Ubuntu Pro linux-image-oracle-lts-20.04 5.4.0.1158.152 Available with Ubuntu Pro linux-image-virtual 5.4.0.231.223 Available with Ubuntu Pro linux-image-virtual-5.4 5.4.0.231.223 Available with Ubuntu Pro linux-image-xilinx-zynqmp 5.4.0.1078.78 Available with Ubuntu Pro linux-image-xilinx-zynqmp-5.4 5.4.0.1078.78 Available with Ubuntu Pro Ubuntu 18.04 LTS linux-image-5.4.0-1158-oracle 5.4.0-1158.168~18.04.1 Available with Ubuntu Pro linux-image-5.4.0-1163-gcp 5.4.0-1163.172~18.04.1 Available with Ubuntu Pro linux-image-5.4.0-1164-azure 5.4.0-1164.170~18.04.1 Available with Ubuntu Pro linux-image-azure 5.4.0.1164.170~18.04.1 Available with Ubuntu Pro linux-image-azure-5.4 5.4.0.1164.170~18.04.1 Available with Ubuntu Pro linux-image-gcp 5.4.0.1163.172~18.04.1 Available with Ubuntu Pro linux-image-gcp-5.4 5.4.0.1163.172~18.04.1 Available with Ubuntu Pro linux-image-oracle 5.4.0.1158.168~18.04.1 Available with Ubuntu Pro linux-image-oracle-5.4 5.4.0.1158.168~18.04.1 Available with Ubuntu Pro After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References: https://ubuntu.com/security/notices/USN-8389-1 CVE-2026-43284, CVE-2026-43494, CVE-2026-43500 . Several security issues were fixed in the Linux kernel for Ubuntu, requiring immediate attention for system stability.. Kernel Security Updates, Escalation Flaw, Ubuntu 20.04 LTS, Ubuntu 18.04 LTS, Linux Security Issues. . Severity: moderate. LinuxSecurity.com Team
Jun 04, 2026 •moderate Ubuntu 172
security advisorycriticalUbuntuUbuntu 8388-1 Linux Kernel Critical Escalation Issues Fix
Several security issues were fixed in the Linux kernel.. ========================================================================== Ubuntu Security Notice USN-8388-1 June 04, 2026 linux, linux-aws, linux-aws-5.15, linux-aws-fips, linux-fips, linux-gcp, linux-gcp-5.15, linux-gcp-fips, linux-gke, linux-gkeop, linux-hwe-5.15, linux-ibm, linux-ibm-5.15, linux-intel-iot-realtime, linux-intel-iotg, linux-kvm, linux-nvidia, linux-nvidia-tegra, linux-nvidia-tegra-5.15, linux-nvidia-tegra-igx, linux-oracle, linux-raspi, linux-realtime vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux: Linux kernel - linux-aws: Linux kernel for Amazon Web Services (AWS) systems - linux-aws-fips: Linux kernel for Amazon Web Services (AWS) systems with FIPS - linux-fips: Linux kernel with FIPS - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-gcp-fips: Linux kernel for Google Cloud Platform (GCP) systems with FIPS - linux-gke: Linux kernel for Google Container Engine (GKE) systems - linux-gkeop: Linux kernel for Google Container Engine (GKE) systems - linux-ibm: Linux kernel for IBM cloud systems - linux-intel-iot-realtime: Linux kernel for Intel IoT Real-time platforms - linux-intel-iotg: Linux kernel for Intel IoT platforms - linux-kvm: Linux kernel for cloud environments - linux-nvidia: Linux kernel for NVIDIA systems - linux-nvidia-tegra: Linux kernel for NVIDIA Tegra systems - linux-nvidia-tegra-igx: Linux kernel for NVIDIA Tegra IGX systems - linux-oracle: Linux kernel for Oracle Cloud systems - linux-raspi: Linux kernel for Raspberry Pi systems - linux-realtime: Linux kernel for Real-time systems - linux-aws-5.15: Linux kernel for Amazon Web Services (AWS) systems - linux-gcp-5.15: Linux kernel for Google Cloud Platform (GCP) systems - linux-hwe-5.15: Linuxhardware enablement (HWE) kernel - linux-ibm-5.15: Linux kernel for IBM cloud systems - linux-nvidia-tegra-5.15: Linux kernel for NVIDIA Tegra systems Details: It was discovered that the Linux kernel did not properly handle shared page fragments during socket buffer operations, collectively known as Dirty Frag. A logic flaw existed in the XFRM ESP-in-TCP subsystem and in the RxRPC networking subsystem when processing paged fragments. A local attacker could use this to escalate privileges, or possibly escape a container. (CVE-2026-43284, CVE-2026-43500) It was discovered that a logic flaw existed in the XFRM ESP-in-TCP subsystem in the Linux kernel when handling socket buffer fragments. This flaw is known as Fragnesia. A local attacker could use this to escalate privileges, or possibly escape a container. (CVE-2026-43503, CVE-2026-46300) Qualys discovered that a race condition existed in the ptrace subsystem of the Linux kernel when privileged processes are exiting. An unprivileged local attacker could use this issue to expose sensitive information. (CVE-2026-46333) Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - RDS protocol; (CVE-2026-43494) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 LTS linux-image-5.15.0-1050-nvidia-tegra-igx 5.15.0-1050.50 linux-image-5.15.0-1050-nvidia-tegra-igx-rt 5.15.0-1050.50 linux-image-5.15.0-1061-nvidia-tegra 5.15.0-1061.61 linux-image-5.15.0-1061-nvidia-tegra-rt 5.15.0-1061.61 linux-image-5.15.0-1092-gkeop 5.15.0-1092.100 linux-image-5.15.0-1101-intel-iot-realtime 5.15.0-1101.103 Available with Ubuntu Pro linux-image-5.15.0-1101-kvm 5.15.0-1101.106 linux-image-5.15.0-1103-ibm 5.15.0-1103.106 linux-image-5.15.0-1103-raspi 5.15.0-1103.106 linux-image-5.15.0-1104-intel-iotg 5.15.0-1104.110 linux-image-5.15.0-1104-nvidia 5.15.0-1104.105 linux-image-5.15.0-1104-nvidia-lowlatency 5.15.0-1104.105 linux-image-5.15.0-1105-gke 5.15.0-1105.111 linux-image-5.15.0-1106-oracle 5.15.0-1106.112 linux-image-5.15.0-1108-realtime 5.15.0-1108.117 Available with Ubuntu Pro linux-image-5.15.0-1109-aws 5.15.0-1109.116 linux-image-5.15.0-1109-aws-64k 5.15.0-1109.116 linux-image-5.15.0-1109-aws-fips 5.15.0-1109.116+fips1 Available with Ubuntu Pro linux-image-5.15.0-1109-gcp 5.15.0-1109.118 linux-image-5.15.0-1109-gcp-fips 5.15.0-1109.118+fips1 Available with Ubuntu Pro linux-image-5.15.0-181-fips 5.15.0-181.191+fips1 Available with Ubuntu Pro linux-image-5.15.0-181-generic 5.15.0-181.191 linux-image-5.15.0-181-generic-64k 5.15.0-181.191 linux-image-5.15.0-181-generic-lpae 5.15.0-181.191 linux-image-aws-5.15 5.15.0.1109.112 linux-image-aws-64k-5.15 5.15.0.1109.112 linux-image-aws-64k-lts-22.04 5.15.0.1109.112 linux-image-aws-fips 5.15.0.1109.105 Available with Ubuntu Pro linux-image-aws-fips-5.15 5.15.0.1109.105 Available with Ubuntu Pro linux-image-aws-lts-22.04 5.15.0.1109.112 linux-image-fips 5.15.0.181.106 Available with Ubuntu Pro linux-image-fips-5.15 5.15.0.181.106 Available with Ubuntu Pro linux-image-gcp-5.15 5.15.0.1109.105 linux-image-gcp-fips 5.15.0.1109.99 Available with Ubuntu Pro linux-image-gcp-fips-5.15 5.15.0.1109.99 Available with Ubuntu Pro linux-image-gcp-lts-22.04 5.15.0.1109.105 linux-image-generic 5.15.0.181.164 linux-image-generic-5.15 5.15.0.181.164 linux-image-generic-64k 5.15.0.181.164 linux-image-generic-64k-5.15 5.15.0.181.164 linux-image-generic-lpae 5.15.0.181.164 linux-image-generic-lpae-5.15 5.15.0.181.164 linux-image-gke 5.15.0.1105.104 linux-image-gke-5.15 5.15.0.1105.104 linux-image-gkeop 5.15.0.1092.91 linux-image-gkeop-5.15 5.15.0.1092.91 linux-image-ibm 5.15.0.1103.99 linux-image-ibm-5.15 5.15.0.1103.99 linux-image-intel-iot-realtime 5.15.0.1101.105 Available with Ubuntu Pro linux-image-intel-iot-realtime-5.15 5.15.0.1101.105 Available with Ubuntu Pro linux-image-intel-iotg 5.15.0.1104.103 linux-image-intel-iotg-5.15 5.15.0.1104.103 linux-image-kvm 5.15.0.1101.97 linux-image-kvm-5.15 5.15.0.1101.97 linux-image-nvidia 5.15.0.1104.104 linux-image-nvidia-5.15 5.15.0.1104.104 linux-image-nvidia-lowlatency 5.15.0.1104.104 linux-image-nvidia-lowlatency-5.15 5.15.0.1104.104 linux-image-nvidia-tegra 5.15.0.1061.61 linux-image-nvidia-tegra-5.15 5.15.0.1061.61 linux-image-nvidia-tegra-igx 5.15.0.1050.52 linux-image-nvidia-tegra-igx-5.15 5.15.0.1050.52 linux-image-nvidia-tegra-igx-rt 5.15.0.1050.52 linux-image-nvidia-tegra-igx-rt-5.15 5.15.0.1050.52 linux-image-nvidia-tegra-rt 5.15.0.1061.61 linux-image-nvidia-tegra-rt-5.15 5.15.0.1061.61 linux-image-oem-20.04 5.15.0.181.164 linux-image-oracle-5.15 5.15.0.1106.102 linux-image-oracle-lts-22.04 5.15.0.1106.102 linux-image-raspi 5.15.0.1103.101 linux-image-raspi-5.15 5.15.0.1103.101 linux-image-raspi-nolpae 5.15.0.1103.101 linux-image-realtime 5.15.0.1108.112 Available with Ubuntu Pro linux-image-realtime-5.15 5.15.0.1108.112 Available with Ubuntu Pro linux-image-virtual 5.15.0.181.164 linux-image-virtual-5.15 5.15.0.181.164 Ubuntu 20.04 LTS linux-image-5.15.0-1061-nvidia-tegra 5.15.0-1061.61~20.04.1 Available with Ubuntu Pro linux-image-5.15.0-1061-nvidia-tegra-rt 5.15.0-1061.61~20.04.1 Available with Ubuntu Pro linux-image-5.15.0-1103-ibm 5.15.0-1103.106~20.04.1 Available with Ubuntu Pro linux-image-5.15.0-1109-aws 5.15.0-1109.116~20.04.1 Available with Ubuntu Pro linux-image-5.15.0-1109-gcp 5.15.0-1109.118~20.04.1 Available with Ubuntu Pro linux-image-5.15.0-181-generic 5.15.0-181.191~20.04.1 Available with Ubuntu Pro linux-image-5.15.0-181-generic-64k 5.15.0-181.191~20.04.1 Available with Ubuntu Pro linux-image-5.15.0-181-generic-lpae 5.15.0-181.191~20.04.1 Available with Ubuntu Pro linux-image-aws 5.15.0.1109.116~20.04.1 Available with Ubuntu Pro linux-image-aws-5.15 5.15.0.1109.116~20.04.1 Available with Ubuntu Pro linux-image-gcp 5.15.0.1109.118~20.04.1 Available with Ubuntu Pro linux-image-gcp-5.15 5.15.0.1109.118~20.04.1 Available with Ubuntu Pro linux-image-generic-5.15 5.15.0.181.191~20.04.1 Available with Ubuntu Pro linux-image-generic-64k-5.15 5.15.0.181.191~20.04.1 Available with Ubuntu Pro linux-image-generic-64k-hwe-20.04 5.15.0.181.191~20.04.1 Available with Ubuntu Pro linux-image-generic-hwe-20.04 5.15.0.181.191~20.04.1 Available with Ubuntu Pro linux-image-generic-lpae-5.15 5.15.0.181.191~20.04.1 Available with Ubuntu Pro linux-image-generic-lpae-hwe-20.04 5.15.0.181.191~20.04.1 Available with Ubuntu Pro linux-image-ibm 5.15.0.1103.106~20.04.1 Available with Ubuntu Pro linux-image-ibm-5.15 5.15.0.1103.106~20.04.1 Available with Ubuntu Pro linux-image-nvidia-tegra 5.15.0.1061.61~20.04.1 Available with Ubuntu Pro linux-image-nvidia-tegra-5.15 5.15.0.1061.61~20.04.1 Available with Ubuntu Pro linux-image-nvidia-tegra-rt 5.15.0.1061.61~20.04.1 Available with Ubuntu Pro linux-image-nvidia-tegra-rt-5.15 5.15.0.1061.61~20.04.1 Available with Ubuntu Pro linux-image-oem-20.04 5.15.0.181.191~20.04.1 Available with Ubuntu Pro linux-image-oem-20.04b 5.15.0.181.191~20.04.1 Available with Ubuntu Pro linux-image-oem-20.04c 5.15.0.181.191~20.04.1 Available with Ubuntu Pro linux-image-oem-20.04d 5.15.0.181.191~20.04.1 Available with Ubuntu Pro linux-image-virtual-5.15 5.15.0.181.191~20.04.1 Available with Ubuntu Pro linux-image-virtual-hwe-20.04 5.15.0.181.191~20.04.1 Available with Ubuntu Pro After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all thirdparty kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References: https://ubuntu.com/security/notices/USN-8388-1 CVE-2026-43284, CVE-2026-43494, CVE-2026-43500, CVE-2026-43503, CVE-2026-46300, CVE-2026-46333 Package Information: https://launchpad.net/ubuntu/+source/linux/5.15.0-181.191 https://launchpad.net/ubuntu/+source/linux-aws/5.15.0-1109.116 https://launchpad.net/ubuntu/+source/linux-aws-fips/5.15.0-1109.116+fips1 https://launchpad.net/ubuntu/+source/linux-fips/5.15.0-181.191+fips1 https://launchpad.net/ubuntu/+source/linux-gcp/5.15.0-1109.118 https://launchpad.net/ubuntu/+source/linux-gcp-fips/5.15.0-1109.118+fips1 https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1105.111 https://launchpad.net/ubuntu/+source/linux-gkeop/5.15.0-1092.100 https://launchpad.net/ubuntu/+source/linux-ibm/5.15.0-1103.106 https://launchpad.net/ubuntu/+source/linux-intel-iot-realtime/5.15.0-1101.103 https://launchpad.net/ubuntu/+source/linux-intel-iotg/5.15.0-1104.110 https://launchpad.net/ubuntu/+source/linux-kvm/5.15.0-1101.106 https://launchpad.net/ubuntu/+source/linux-nvidia/5.15.0-1104.105 https://launchpad.net/ubuntu/+source/linux-nvidia-tegra/5.15.0-1061.61 https://launchpad.net/ubuntu/+source/linux-nvidia-tegra-igx/5.15.0-1050.50 https://launchpad.net/ubuntu/+source/linux-oracle/5.15.0-1106.112 https://launchpad.net/ubuntu/+source/linux-raspi/5.15.0-1103.106 https://launchpad.net/ubuntu/+source/linux-realtime/5.15.0-1108.117 . Critical security advisory for Ubuntu Linux kernel addresses multiple issues that could lead to privilege escalation and system compromise.. Ubuntu Linux kernel security escalation update advisory. . Severity: Critical. LinuxSecurity.com Team
Jun 04, 2026 •Critical Ubuntu 87
security advisorydenial of servicebuffer overflowDebian DSA-6322-1 frr Important Denial of Service Risk Multiple CVEs
Several vulnerabilities were discovered in FRRouting (frr), a suite of internet routing protocol daemons. A remote attacker could trigger these issues by sending specially crafted protocol packets to a vulnerable daemon, resulting in denial of service (infinite loops, NULL pointer dereferences and crashes) or potentially the execution of arbitrary code. - ------------------------------------------------------------------------- Debian Security Advisory DSA-6322-1
Jun 04, 2026 •Important Debian 
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