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172
security advisorycriticalUbuntuUbuntu 24.04: Linux-azure-nvidia Critical Issues CVE-2025-40300
Several security issues were fixed in the Linux kernel.. ========================================================================== Ubuntu Security Notice USN-7940-2 January 09, 2026 linux-azure-nvidia 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-nvidia: Linux kernel for Microsoft Azure Cloud systems, N-Series Details: Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this to expose sensitive information from the host OS. (CVE-2025-40300) 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; - PowerPC architecture; - x86 architecture; - Cryptographic API; - ACPI drivers; - Ublk userspace block driver; - Clock framework and drivers; - EDAC drivers; - GPU drivers; - HSI subsystem; - IIO subsystem; - InfiniBand drivers; - Media drivers; - MemoryStick subsystem; - Network drivers; - NTB driver; - PCI subsystem; - Remote Processor subsystem; - Thermal drivers; - Virtio Host (VHOST) subsystem; - 9P distributed file system; - File systems infrastructure; - JFS file system; - Network file system (NFS) server daemon; - NTFS3 file system; - SMB network file system; - Memory management; - Bluetooth subsystem; - RDMA verbs API; - Kernel fork() syscall; - Timer subsystem; - Tracing infrastructure; - Watch queue notification mechanism; - Appletalk network protocol; - Asynchronous Transfer Mode(ATM) subsystem; - Networking core; - IPv4 networking; - IPv6 networking; - Netfilter; - Network traffic control; - SCTP protocol; - TLS protocol; - SoC Audio for Freescale CPUs drivers; (CVE-2023-53034, CVE-2024-58092, CVE-2025-21729, CVE-2025-22018, CVE-2025-22019, CVE-2025-22020, CVE-2025-22021, CVE-2025-22025, CVE-2025-22027, CVE-2025-22028, CVE-2025-22033, CVE-2025-22035, CVE-2025-22036, CVE-2025-22038, CVE-2025-22039, CVE-2025-22040, CVE-2025-22041, CVE-2025-22042, CVE-2025-22044, CVE-2025-22045, CVE-2025-22047, CVE-2025-22050, CVE-2025-22053, CVE-2025-22054, CVE-2025-22055, CVE-2025-22056, CVE-2025-22057, CVE-2025-22058, CVE-2025-22060, CVE-2025-22062, CVE-2025-22063, CVE-2025-22064, CVE-2025-22065, CVE-2025-22066, CVE-2025-22068, CVE-2025-22070, CVE-2025-22071, CVE-2025-22072, CVE-2025-22073, CVE-2025-22075, CVE-2025-22079, CVE-2025-22080, CVE-2025-22081, CVE-2025-22083, CVE-2025-22086, CVE-2025-22089, CVE-2025-22090, CVE-2025-22095, CVE-2025-22097, CVE-2025-23136, CVE-2025-23138, CVE-2025-37838, CVE-2025-37937, CVE-2025-37958, CVE-2025-38118, CVE-2025-38152, CVE-2025-38227, CVE-2025-38240, CVE-2025-38352, CVE-2025-38575, CVE-2025-38616, CVE-2025-38637, CVE-2025-38666, CVE-2025-38678, CVE-2025-39682, CVE-2025-39728, CVE-2025-39735, CVE-2025-39964, CVE-2025-39993, CVE-2025-40018, CVE-2025-40114, CVE-2025-40157) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 24.04 LTS linux-image-6.8.0-1029-azure-nvidia 6.8.0-1029.32 linux-image-azure-nvidia-6.8 6.8.0-1029.32 linux-image-azure-nvidia-lts-24.04 6.8.0-1029.32 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-7940-2 https://ubuntu.com/security/notices/USN-7940-1 CVE-2023-53034, CVE-2024-58092, CVE-2025-21729, CVE-2025-22018, CVE-2025-22019, CVE-2025-22020, CVE-2025-22021, CVE-2025-22025, CVE-2025-22027, CVE-2025-22028, CVE-2025-22033, CVE-2025-22035, CVE-2025-22036, CVE-2025-22038, CVE-2025-22039, CVE-2025-22040, CVE-2025-22041, CVE-2025-22042, CVE-2025-22044, CVE-2025-22045, CVE-2025-22047, CVE-2025-22050, CVE-2025-22053, CVE-2025-22054, CVE-2025-22055, CVE-2025-22056, CVE-2025-22057, CVE-2025-22058, CVE-2025-22060, CVE-2025-22062, CVE-2025-22063, CVE-2025-22064, CVE-2025-22065, CVE-2025-22066, CVE-2025-22068, CVE-2025-22070, CVE-2025-22071, CVE-2025-22072, CVE-2025-22073, CVE-2025-22075, CVE-2025-22079, CVE-2025-22080, CVE-2025-22081, CVE-2025-22083, CVE-2025-22086, CVE-2025-22089, CVE-2025-22090, CVE-2025-22095, CVE-2025-22097, CVE-2025-23136, CVE-2025-23138, CVE-2025-37838, CVE-2025-37937, CVE-2025-37958, CVE-2025-38118, CVE-2025-38152, CVE-2025-38227, CVE-2025-38240, CVE-2025-38352, CVE-2025-38575, CVE-2025-38616, CVE-2025-38637, CVE-2025-38666, CVE-2025-38678, CVE-2025-39682, CVE-2025-39728, CVE-2025-39735, CVE-2025-39964, CVE-2025-39993, CVE-2025-40018, CVE-2025-40114, CVE-2025-40157, CVE-2025-40300 Package Information: https://launchpad.net/ubuntu/+source/linux-azure-nvidia/6.8.0-1029.32 . Discover critical security issues fixed in the Ubuntu Linux kernel affecting Azure systems. Stay secure with updates!. Ubuntu Security, Azure Linux Kernel, Security Issues, Update Instructions, Kernel Vulnerabilities. . Severity: Critical. LinuxSecurity.com Team
Jan 09, 2026
•Critical
Ubuntu
172
security advisoryDoSUbuntuUbuntu 18.04 LTS USN-7937-1 Linux-azure-fips Critical Threat
Several security issues were fixed in the Linux kernel.. ========================================================================== Ubuntu Security Notice USN-7937-1 December 16, 2025 linux-azure-fips 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-azure-fips: Linux kernel for Microsoft Azure Cloud systems with FIPS Details: Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this to expose sensitive information from the host OS. (CVE-2025-40300) 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; - ACPI drivers; - DMA engine subsystem; - GPU drivers; - HSI subsystem; - Hardware monitoring drivers; - InfiniBand drivers; - Mailbox framework; - Network drivers; - Ethernet team driver; - AFS file system; - Ceph distributed file system; - Ext4 file system; - Network file system (NFS) server daemon; - NILFS2 file system; - File systems infrastructure; - KVM subsystem; - L3 Master device support module; - Timer subsystem; - Tracing infrastructure; - Memory management; - Appletalk network protocol; - DCCP (Datagram Congestion Control Protocol); - IPv6 networking; - Netfilter; - NET/ROM layer; - Open vSwitch; - SCTP protocol; - USB sound devices; (CVE-2021-47385, CVE-2022-49026, CVE-2022-49390, CVE-2023-52574, CVE-2023-52650, CVE-2024-41006, CVE-2024-49935, CVE-2024-49963, CVE-2024-50006, CVE-2024-50067,CVE-2024-50095, CVE-2024-50179, CVE-2024-50299, CVE-2024-53090, CVE-2024-53112, CVE-2024-53124, CVE-2024-53150, CVE-2024-53217, CVE-2024-56767, CVE-2024-58083, CVE-2025-21715, CVE-2025-21722, CVE-2025-21761, CVE-2025-21791, CVE-2025-21811, CVE-2025-21855, CVE-2025-37838, CVE-2025-37958, CVE-2025-38352, CVE-2025-38666, CVE-2025-39964, CVE-2025-40018) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS linux-image-4.15.0-2104-azure-fips 4.15.0-2104.110 Available with Ubuntu Pro linux-image-azure-fips 4.15.0.2104.100 Available with Ubuntu Pro linux-image-azure-fips-4.15 4.15.0.2104.100 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-7937-1 CVE-2021-47385, CVE-2022-49026, CVE-2022-49390, CVE-2023-52574, CVE-2023-52650, CVE-2024-41006, CVE-2024-49935, CVE-2024-49963, CVE-2024-50006, CVE-2024-50067, CVE-2024-50095, CVE-2024-50179, CVE-2024-50299, CVE-2024-53090, CVE-2024-53112, CVE-2024-53124, CVE-2024-53150, CVE-2024-53217, CVE-2024-56767, CVE-2024-58083, CVE-2025-21715, CVE-2025-21722, CVE-2025-21761, CVE-2025-21791, CVE-2025-21811, CVE-2025-21855, CVE-2025-37838, CVE-2025-37958, CVE-2025-38352, CVE-2025-38666, CVE-2025-39964, CVE-2025-40018, CVE-2025-40300 Package Information: . Multiple security issues fixed in the Linux kernel for AzureFIPS on Ubuntu 18.04 LTS, enhancing system integrity.. Linux Kernel, Azure FIPS, Ubuntu Security. . Severity: Critical. LinuxSecurity.com Team
Dec 15, 2025
•Critical
Ubuntu
172
security advisoryinformation leakUbuntuUbuntu 22.04: linux-kvm Critical Insufficient Isolation CVE-2025-40300
Several security issues were fixed in the Linux kernel.. ========================================================================== Ubuntu Security Notice USN-7933-1 December 15, 2025 linux-kvm vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 22.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-kvm: Linux kernel for cloud environments Details: Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this to expose sensitive information from the host OS. (CVE-2025-40300) 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: - ARM32 architecture; - ARM64 architecture; - MIPS architecture; - PowerPC architecture; - RISC-V architecture; - S390 architecture; - x86 architecture; - Block layer subsystem; - ACPI drivers; - ATM drivers; - DRBD Distributed Replicated Block Device drivers; - Bus devices; - Clock framework and drivers; - Data acquisition framework and drivers; - Hardware crypto device drivers; - Device frequency scaling framework; - Buffer Sharing and Synchronization framework; - DMA engine subsystem; - ARM SCMI message protocol; - GPU drivers; - HID subsystem; - Hardware monitoring drivers; - I2C subsystem; - I3C subsystem; - IIO subsystem; - InfiniBand drivers; - Input Device core drivers; - IOMMU subsystem; - Media drivers; - Network drivers; - Mellanox network drivers; - PCI subsystem; - PCCARD (PCMCIA/CardBus) bus subsystem; - PHY drivers; - Power supply drivers; - Voltage and Current Regulator drivers; - SCSI subsystem; - ASPEED SoC drivers; - QCOM SoC drivers; - small TFT LCD display modules; - Trusted Execution Environment drivers; - TTY drivers; - UFS subsystem; - USB core drivers; - DesignWare USB3 driver; - USB Gadget drivers; - Framebuffer layer; - BTRFS file system; - File systems infrastructure; - EFI Variable file system; - Ext4 file system; - F2FS file system; - JFS file system; - Network file system (NFS) client; - Network file system (NFS) server daemon; - NILFS2 file system; - NTFS3 file system; - SMB network file system; - Asynchronous Transfer Mode (ATM) subsystem; - BPF subsystem; - NFS page cache wrapper; - Memory management; - Networking subsytem; - UDP network protocol; - Perf events; - RCU subsystem; - Tracing infrastructure; - 802.1Q VLAN protocol; - Appletalk network protocol; - Amateur Radio drivers; - B.A.T.M.A.N. meshing protocol; - Bluetooth subsystem; - Ethernet bridge; - Networking core; - HSR network protocol; - IPv4 networking; - IPv6 networking; - Multipath TCP; - Netfilter; - Netlink; - Packet sockets; - Network traffic control; - SCTP protocol; - TLS protocol; - VMware vSockets driver; - Wireless networking; - SoC audio core drivers; - USB sound devices; (CVE-2022-50070, CVE-2022-50327, CVE-2023-52593, CVE-2023-52935, CVE-2023-53074, CVE-2024-26700, CVE-2024-26896, CVE-2024-50061, CVE-2024-53068, CVE-2025-37925, CVE-2025-37968, CVE-2025-38095, CVE-2025-38148, CVE-2025-38165, CVE-2025-38335, CVE-2025-38347, CVE-2025-38468, CVE-2025-38470, CVE-2025-38473, CVE-2025-38474, CVE-2025-38476, CVE-2025-38477, CVE-2025-38478, CVE-2025-38480, CVE-2025-38481, CVE-2025-38482, CVE-2025-38483, CVE-2025-38487, CVE-2025-38488, CVE-2025-38494, CVE-2025-38495, CVE-2025-38497, CVE-2025-38499, CVE-2025-38502, CVE-2025-38527, CVE-2025-38528, CVE-2025-38529, CVE-2025-38530, CVE-2025-38535,CVE-2025-38538, CVE-2025-38539, CVE-2025-38548, CVE-2025-38550, CVE-2025-38553, CVE-2025-38555, CVE-2025-38563, CVE-2025-38565, CVE-2025-38569, CVE-2025-38572, CVE-2025-38574, CVE-2025-38576, CVE-2025-38577, CVE-2025-38578, CVE-2025-38579, CVE-2025-38581, CVE-2025-38583, CVE-2025-38601, CVE-2025-38602, CVE-2025-38604, CVE-2025-38608, CVE-2025-38609, CVE-2025-38612, CVE-2025-38614, CVE-2025-38617, CVE-2025-38618, CVE-2025-38622, CVE-2025-38623, CVE-2025-38624, CVE-2025-38630, CVE-2025-38634, CVE-2025-38635, CVE-2025-38639, CVE-2025-38645, CVE-2025-38650, CVE-2025-38652, CVE-2025-38663, CVE-2025-38664, CVE-2025-38666, CVE-2025-38668, CVE-2025-38670, CVE-2025-38671, CVE-2025-38676, CVE-2025-38677, CVE-2025-38678, CVE-2025-38680, CVE-2025-38681, CVE-2025-38683, CVE-2025-38684, CVE-2025-38685, CVE-2025-38687, CVE-2025-38691, CVE-2025-38693, CVE-2025-38694, CVE-2025-38695, CVE-2025-38696, CVE-2025-38697, CVE-2025-38698, CVE-2025-38699, CVE-2025-38700, CVE-2025-38701, CVE-2025-38706, CVE-2025-38707, CVE-2025-38708, CVE-2025-38711, CVE-2025-38712, CVE-2025-38713, CVE-2025-38714, CVE-2025-38715, CVE-2025-38718, CVE-2025-38721, CVE-2025-38724, CVE-2025-38725, CVE-2025-38727, CVE-2025-38729, CVE-2025-38732, CVE-2025-39673, CVE-2025-39675, CVE-2025-39676, CVE-2025-39681, CVE-2025-39683, CVE-2025-39684, CVE-2025-39685, CVE-2025-39686, CVE-2025-39687, CVE-2025-39689, CVE-2025-39691, CVE-2025-39693, CVE-2025-39697, CVE-2025-39702, CVE-2025-39703, CVE-2025-39709, CVE-2025-39710, CVE-2025-39713, CVE-2025-39714, CVE-2025-39724, CVE-2025-39730, CVE-2025-39734, CVE-2025-39736, CVE-2025-39737, CVE-2025-39738, CVE-2025-39742, CVE-2025-39743, CVE-2025-39749, CVE-2025-39752, CVE-2025-39756, CVE-2025-39757, CVE-2025-39760, CVE-2025-39766, CVE-2025-39772, CVE-2025-39773, CVE-2025-39776, CVE-2025-39782, CVE-2025-39783, CVE-2025-39787, CVE-2025-39788, CVE-2025-39790, CVE-2025-39794, CVE-2025-39795, CVE-2025-39798, CVE-2025-39801, CVE-2025-39806, CVE-2025-39808, CVE-2025-39812, CVE-2025-39813, CVE-2025-39817, CVE-2025-39823, CVE-2025-39824,CVE-2025-39828, CVE-2025-39835, CVE-2025-39839, CVE-2025-39841, CVE-2025-39844, CVE-2025-39845, CVE-2025-39846, CVE-2025-39847, CVE-2025-39848, CVE-2025-39853, CVE-2025-39860, CVE-2025-39864, CVE-2025-39865, CVE-2025-39866, CVE-2025-39891, CVE-2025-39894, CVE-2025-39902, CVE-2025-39920) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 LTS linux-image-5.15.0-1089-kvm 5.15.0-1089.94 linux-image-kvm 5.15.0.1089.85 linux-image-kvm-5.15 5.15.0.1089.85 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-7933-1 CVE-2022-50070, CVE-2022-50327, CVE-2023-52593, CVE-2023-52935, CVE-2023-53074, CVE-2024-26700, CVE-2024-26896, CVE-2024-50061, CVE-2024-53068, CVE-2025-37925, CVE-2025-37968, CVE-2025-38095, CVE-2025-38148, CVE-2025-38165, CVE-2025-38335, CVE-2025-38347, CVE-2025-38468, CVE-2025-38470, CVE-2025-38473, CVE-2025-38474, CVE-2025-38476, CVE-2025-38477, CVE-2025-38478, CVE-2025-38480, CVE-2025-38481, CVE-2025-38482, CVE-2025-38483, CVE-2025-38487, CVE-2025-38488, CVE-2025-38494, CVE-2025-38495, CVE-2025-38497, CVE-2025-38499, CVE-2025-38502, CVE-2025-38527, CVE-2025-38528, CVE-2025-38529, CVE-2025-38530, CVE-2025-38535, CVE-2025-38538, CVE-2025-38539, CVE-2025-38548, CVE-2025-38550, CVE-2025-38553, CVE-2025-38555, CVE-2025-38563, CVE-2025-38565, CVE-2025-38569, CVE-2025-38572, CVE-2025-38574, CVE-2025-38576, CVE-2025-38577, CVE-2025-38578,CVE-2025-38579, CVE-2025-38581, CVE-2025-38583, CVE-2025-38601, CVE-2025-38602, CVE-2025-38604, CVE-2025-38608, CVE-2025-38609, CVE-2025-38612, CVE-2025-38614, CVE-2025-38617, CVE-2025-38618, CVE-2025-38622, CVE-2025-38623, CVE-2025-38624, CVE-2025-38630, CVE-2025-38634, CVE-2025-38635, CVE-2025-38639, CVE-2025-38645, CVE-2025-38650, CVE-2025-38652, CVE-2025-38663, CVE-2025-38664, CVE-2025-38666, CVE-2025-38668, CVE-2025-38670, CVE-2025-38671, CVE-2025-38676, CVE-2025-38677, CVE-2025-38678, CVE-2025-38680, CVE-2025-38681, CVE-2025-38683, CVE-2025-38684, CVE-2025-38685, CVE-2025-38687, CVE-2025-38691, CVE-2025-38693, CVE-2025-38694, CVE-2025-38695, CVE-2025-38696, CVE-2025-38697, CVE-2025-38698, CVE-2025-38699, CVE-2025-38700, CVE-2025-38701, CVE-2025-38706, CVE-2025-38707, CVE-2025-38708, CVE-2025-38711, CVE-2025-38712, CVE-2025-38713, CVE-2025-38714, CVE-2025-38715, CVE-2025-38718, CVE-2025-38721, CVE-2025-38724, CVE-2025-38725, CVE-2025-38727, CVE-2025-38729, CVE-2025-38732, CVE-2025-39673, CVE-2025-39675, CVE-2025-39676, CVE-2025-39681, CVE-2025-39683, CVE-2025-39684, CVE-2025-39685, CVE-2025-39686, CVE-2025-39687, CVE-2025-39689, CVE-2025-39691, CVE-2025-39693, CVE-2025-39697, CVE-2025-39702, CVE-2025-39703, CVE-2025-39709, CVE-2025-39710, CVE-2025-39713, CVE-2025-39714, CVE-2025-39724, CVE-2025-39730, CVE-2025-39734, CVE-2025-39736, CVE-2025-39737, CVE-2025-39738, CVE-2025-39742, CVE-2025-39743, CVE-2025-39749, CVE-2025-39752, CVE-2025-39756, CVE-2025-39757, CVE-2025-39760, CVE-2025-39766, CVE-2025-39772, CVE-2025-39773, CVE-2025-39776, CVE-2025-39782, CVE-2025-39783, CVE-2025-39787, CVE-2025-39788, CVE-2025-39790, CVE-2025-39794, CVE-2025-39795, CVE-2025-39798, CVE-2025-39801, CVE-2025-39806, CVE-2025-39808, CVE-2025-39812, CVE-2025-39813, CVE-2025-39817, CVE-2025-39823, CVE-2025-39824, CVE-2025-39828, CVE-2025-39835, CVE-2025-39839, CVE-2025-39841, CVE-2025-39844, CVE-2025-39845, CVE-2025-39846, CVE-2025-39847,CVE-2025-39848, CVE-2025-39853, CVE-2025-39860, CVE-2025-39864, CVE-2025-39865, CVE-2025-39866, CVE-2025-39891, CVE-2025-39894, CVE-2025-39902, CVE-2025-39920, CVE-2025-40300 Package Information: https://launchpad.net/ubuntu/+source/linux-kvm/5.15.0-1089.94 . Address security risks in Ubuntu 22.04 LTS regarding kernel vulnerabilities and their fixes in linux-kvm.. kernel vulnerabilities, Ubuntu security, KVM updates, isolation issues. . Severity: Critical. LinuxSecurity.com Team
Dec 15, 2025
•Critical
Ubuntu
172
security advisoryUbuntukernelUbuntu 24.04 LTS: USN-7861-5 Linux Kernel Issues Critical Fix
Several security issues were fixed in the Linux kernel.. ========================================================================== Ubuntu Security Notice USN-7861-5 December 03, 2025 linux-raspi, linux-raspi-realtime, linux-xilinx 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-raspi: Linux kernel for Raspberry Pi systems - linux-raspi-realtime: Linux kernel for Raspberry Pi Real-time systems - linux-xilinx: Linux kernel for Xilinx systems Details: Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this to expose sensitive information from the host OS. (CVE-2025-40300) 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: - HSI subsystem; - Bluetooth subsystem; - Timer subsystem; (CVE-2025-37838, CVE-2025-38118, CVE-2025-38352) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 24.04 LTS linux-image-6.8.0-1019-xilinx 6.8.0-1019.20 linux-image-6.8.0-1042-raspi 6.8.0-1042.46 linux-image-6.8.0-2033-raspi-realtime 6.8.0-2033.34 Available with Ubuntu Pro linux-image-raspi 6.8.0-1042.46 linux-image-raspi-6.8 6.8.0-1042.46 linux-image-raspi-realtime 6.8.0-2033.34 Available with Ubuntu Pro linux-image-raspi-realtime-6.8 6.8.0-2033.34 Available with Ubuntu Pro linux-image-xilinx 6.8.0.1019.20 linux-image-xilinx-6.8 6.8.0.1019.20 linux-image-xilinx-zynqmp 6.8.0.1019.20 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-7861-5 https://ubuntu.com/security/notices/USN-7861-4 https://ubuntu.com/security/notices/USN-7861-3 https://ubuntu.com/security/notices/USN-7861-2 https://ubuntu.com/security/notices/USN-7861-1 CVE-2025-37838, CVE-2025-38118, CVE-2025-38352, CVE-2025-40300 Package Information: https://launchpad.net/ubuntu/+source/linux-raspi/6.8.0-1042.46 . Several security issues fixed in the Linux kernel for Ubuntu 24.04 enhancing system protection against exploits.. Linux Kernel Issues, Ubuntu Security Update, Kernel Compromise, Insufficient Isolation, VMSCAPE Attack. . Severity: Critical. LinuxSecurity.com Team
Dec 03, 2025
•Critical
Ubuntu
172
security advisoryinformation leakUbuntuUbuntu 22.04 LTS: USN-7861-4 Linux Kernel Updates for AWS
Several security issues were fixed in the Linux kernel.. ========================================================================== Ubuntu Security Notice USN-7861-4 November 19, 2025 linux-aws-6.8 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 22.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-aws-6.8: Linux kernel for Amazon Web Services (AWS) systems Details: Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this to expose sensitive information from the host OS. (CVE-2025-40300) 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: - HSI subsystem; - Bluetooth subsystem; - Timer subsystem; (CVE-2025-37838, CVE-2025-38118, CVE-2025-38352) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 LTS linux-image-6.8.0-1042-aws 6.8.0-1042.44~22.04.1 linux-image-6.8.0-1042-aws-64k 6.8.0-1042.44~22.04.1 linux-image-aws 6.8.0-1042.44~22.04.1 linux-image-aws-6.8 6.8.0-1042.44~22.04.1 linux-image-aws-64k 6.8.0-1042.44~22.04.1 linux-image-aws-64k-6.8 6.8.0-1042.44~22.04.1 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 haveinstalled. 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-7861-4 https://ubuntu.com/security/notices/USN-7861-3 https://ubuntu.com/security/notices/USN-7861-2 https://ubuntu.com/security/notices/USN-7861-1 CVE-2025-37838, CVE-2025-38118, CVE-2025-38352, CVE-2025-40300 Package Information: https://launchpad.net/ubuntu/+source/linux-aws-6.8/6.8.0-1042.44~22.04.1 . Multiple security fixes in the Linux kernel for Ubuntu 22.04 LTS addressing important vulnerabilities.. Ubuntu AWS Kernel Security Issues Update. . Severity: Important. LinuxSecurity.com Team
Nov 19, 2025
•Important
Ubuntu
172
security advisorythreatUbuntuKernel Isolation Flaw in Ubuntu 24.04 LTS: USN-7861-3 CVE-2025-40300
Several security issues were fixed in the Linux kernel.. ========================================================================== Ubuntu Security Notice USN-7861-3 November 13, 2025 linux-nvidia-6.8, linux-oracle, linux-oracle-6.8 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-oracle: Linux kernel for Oracle Cloud systems - linux-nvidia-6.8: Linux kernel for NVIDIA systems - linux-oracle-6.8: Linux kernel for Oracle Cloud systems Details: Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this to expose sensitive information from the host OS. (CVE-2025-40300) 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: - HSI subsystem; - Bluetooth subsystem; - Timer subsystem; (CVE-2025-37838, CVE-2025-38118, CVE-2025-38352) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 24.04 LTS linux-image-6.8.0-1039-oracle 6.8.0-1039.40 linux-image-6.8.0-1039-oracle-64k 6.8.0-1039.40 linux-image-oracle-6.8 6.8.0-1039.40 linux-image-oracle-64k-6.8 6.8.0-1039.40 linux-image-oracle-64k-lts-24.04 6.8.0-1039.40 linux-image-oracle-lts-24.04 6.8.0-1039.40 Ubuntu 22.04 LTS linux-image-6.8.0-1039-oracle 6.8.0-1039.40~22.04.1 linux-image-6.8.0-1039-oracle-64k 6.8.0-1039.40~22.04.1 linux-image-6.8.0-1042-nvidia 6.8.0-1042.45~22.04.1 linux-image-6.8.0-1042-nvidia-64k 6.8.0-1042.45~22.04.1 linux-image-nvidia-6.8 6.8.0-1042.45~22.04.1 linux-image-nvidia-64k-6.8 6.8.0-1042.45~22.04.1 linux-image-nvidia-64k-hwe-22.04 6.8.0-1042.45~22.04.1 linux-image-nvidia-hwe-22.04 6.8.0-1042.45~22.04.1 linux-image-oracle 6.8.0-1039.40~22.04.1 linux-image-oracle-6.8 6.8.0-1039.40~22.04.1 linux-image-oracle-64k 6.8.0-1039.40~22.04.1 linux-image-oracle-64k-6.8 6.8.0-1039.40~22.04.1 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-7861-3 https://ubuntu.com/security/notices/USN-7861-2 https://ubuntu.com/security/notices/USN-7861-1 CVE-2025-37838, CVE-2025-38118, CVE-2025-38352, CVE-2025-40300 Package Information: https://launchpad.net/ubuntu/+source/linux-oracle/6.8.0-1039.40 https://launchpad.net/ubuntu/+source/linux-nvidia-6.8/6.8.0-1042.45~22.04.1 . Several security issues fixed in Linux kernel for Ubuntu 22.04 and 24.04 with critical vulnerabilities addressed.. linux kernel security, ubuntu security fixes, kernel patch updates, isolation vulnerabilities. . Severity: Critical. LinuxSecurity.com Team
Nov 13, 2025
•Critical
Ubuntu
172
security advisorykernel patchUbuntuUbuntu 16.04: Linux Kernel FIPS Critical Flaws Mitigation USN-7865-1
Several security issues were fixed in the Linux kernel.. ========================================================================== Ubuntu Security Notice USN-7865-1 November 10, 2025 linux-fips vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 16.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-fips: Linux kernel with FIPS Details: Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this to expose sensitive information from the host OS. (CVE-2025-40300) 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: - Virtio block driver; - DMA engine subsystem; - GPU drivers; - HSI subsystem; - Media drivers; - Network drivers; - Ethernet team driver; - TTY drivers; - Framebuffer layer; - BTRFS file system; - Ext4 file system; - Network file system (NFS) server daemon; - Timer subsystem; - DCCP (Datagram Congestion Control Protocol); - IPv6 networking; - NET/ROM layer; - Packet sockets; - SCTP protocol; - VMware vSockets driver; - USB sound devices; (CVE-2021-47149, CVE-2021-47294, CVE-2021-47319, CVE-2021-47330, CVE-2021-47589, CVE-2023-52574, CVE-2023-52650, CVE-2024-27078, CVE-2024-35849, CVE-2024-49924, CVE-2024-50006, CVE-2024-50299, CVE-2024-53124, CVE-2024-53150, CVE-2024-56767, CVE-2025-21796, CVE-2025-37785, CVE-2025-37838, CVE-2025-38352, CVE-2025-38617, CVE-2025-38618) Update instructions: The problem can be corrected by updating your system to thefollowing package versions: Ubuntu 16.04 LTS linux-image-4.4.0-1119-fips 4.4.0-1119.126 Available with Ubuntu Pro linux-image-fips 4.4.0.1119.120 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-7865-1 CVE-2021-47149, CVE-2021-47294, CVE-2021-47319, CVE-2021-47330, CVE-2021-47589, CVE-2023-52574, CVE-2023-52650, CVE-2024-27078, CVE-2024-35849, CVE-2024-49924, CVE-2024-50006, CVE-2024-50299, CVE-2024-53124, CVE-2024-53150, CVE-2024-56767, CVE-2025-21796, CVE-2025-37785, CVE-2025-37838, CVE-2025-38352, CVE-2025-38617, CVE-2025-38618, CVE-2025-40300 Package Information: . Several security flaws in the Linux kernel fixed with critical updates on Ubuntu 16.04. Ensure your system is secure.. linux kernel, ubuntu, fips, system update, security issues. . Severity: Critical. LinuxSecurity.com Team
Nov 10, 2025
•Critical
Ubuntu
172
security advisoryUbuntukernelUbuntu 18.04 LTS: Major Linux Kernel Security Issues VMSCAPE CVE-2025-40300
Several security issues were fixed in the Linux kernel.. ========================================================================== Ubuntu Security Notice USN-7853-3 November 07, 2025 linux-azure, linux-azure-4.15 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-azure-4.15: Linux kernel for Microsoft Azure Cloud systems - linux-azure: Linux kernel for Microsoft Azure Cloud systems Details: Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this to expose sensitive information from the host OS. (CVE-2025-40300) 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: - DMA engine subsystem; - GPU drivers; - HSI subsystem; - Ethernet team driver; - Ext4 file system; - Timer subsystem; - DCCP (Datagram Congestion Control Protocol); - IPv6 networking; - NET/ROM layer; - SCTP protocol; - USB sound devices; (CVE-2023-52574, CVE-2023-52650, CVE-2024-41006, CVE-2024-50006, CVE-2024-50299, CVE-2024-53124, CVE-2024-53150, CVE-2024-56767, CVE-2025-37838, CVE-2025-38352) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS linux-image-4.15.0-1194-azure 4.15.0-1194.209 Available with Ubuntu Pro linux-image-azure-4.15 4.15.0.1194.162 Available withUbuntu Pro linux-image-azure-lts-18.04 4.15.0.1194.162 Available with Ubuntu Pro Ubuntu 16.04 LTS linux-image-4.15.0-1194-azure 4.15.0-1194.209~16.04.1 Available with Ubuntu Pro linux-image-azure 4.15.0.1194.209~16.04.1 Available with Ubuntu Pro Ubuntu 14.04 LTS linux-image-4.15.0-1194-azure 4.15.0-1194.209~14.04.1 Available with Ubuntu Pro linux-image-azure 4.15.0.1194.209~14.04.1 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-7853-3 https://ubuntu.com/security/notices/USN-7853-2 https://ubuntu.com/security/notices/USN-7853-1 CVE-2023-52574, CVE-2023-52650, CVE-2024-41006, CVE-2024-50006, CVE-2024-50299, CVE-2024-53124, CVE-2024-53150, CVE-2024-56767, CVE-2025-37838, CVE-2025-38352, CVE-2025-40300 . A critical update for Ubuntu kernel addresses multiple security flaws, crucial for safeguarding Azure cloud systems.. Ubuntu kernel vulnerabilities, Azure security update, Linux kernel patch, cloud system protection. . Severity: Critical. LinuxSecurity.com Team
Nov 07, 2025
•Critical
Ubuntu
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