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Ubuntu 22.04: Real-time Kernel Vulnerabilities in USN-7767-2 CVE-2025-21964

Several security issues were fixed in the Linux kernel.. ========================================================================== Ubuntu Security Notice USN-7767-2 September 25, 2025 linux-realtime-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-realtime-6.8: Linux kernel for Real-time systems Details: 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; - x86 architecture; - Compute Acceleration Framework; - Bus devices; - AMD CDX bus driver; - DPLL subsystem; - EFI core; - GPIO subsystem; - GPU drivers; - HID subsystem; - I2C subsystem; - InfiniBand drivers; - Multiple devices driver; - Network drivers; - Mellanox network drivers; - NVME drivers; - Pin controllers subsystem; - RapidIO drivers; - Voltage and Current Regulator drivers; - SCSI subsystem; - SLIMbus drivers; - QCOM SoC drivers; - UFS subsystem; - USB DSL drivers; - Renesas USBHS Controller drivers; - USB Type-C Connector System Software Interface driver; - Framebuffer layer; - ACRN Hypervisor Service Module driver; - Network file system (NFS) client; - Proc file system; - SMB network file system; - Memory Management; - Scheduler infrastructure; - SoC audio core drivers; - Perf events; - Tracing infrastructure; - Memory management; - 802.1Q VLAN protocol; - Asynchronous Transfer Mode (ATM) subsystem; - Bluetooth subsystem; - Devlink API; - IPv4 networking; - IPv6 networking; - Logical Link layer; - Management Component Transport Protocol (MCTP); - Multipath TCP; - Netfilter; - Network traffic control; - Switch device API; - Wirelessnetworking; - eXpress Data Path; (CVE-2025-21964, CVE-2025-21890, CVE-2025-21934, CVE-2025-21929, CVE-2025-21922, CVE-2025-21970, CVE-2025-21913, CVE-2025-21937, CVE-2025-21872, CVE-2025-21972, CVE-2025-21892, CVE-2025-21991, CVE-2025-21967, CVE-2025-21894, CVE-2025-21881, CVE-2025-21885, CVE-2025-21999, CVE-2025-21978, CVE-2025-22001, CVE-2025-21979, CVE-2025-21951, CVE-2025-22003, CVE-2025-21963, CVE-2025-21936, CVE-2025-21891, CVE-2025-21941, CVE-2025-21895, CVE-2025-21982, CVE-2025-21919, CVE-2025-21961, CVE-2025-21946, CVE-2025-21889, CVE-2025-21899, CVE-2025-21873, CVE-2025-37889, CVE-2025-22008, CVE-2025-21969, CVE-2025-21957, CVE-2025-21925, CVE-2025-21945, CVE-2025-21927, CVE-2025-21878, CVE-2025-21995, CVE-2025-21981, CVE-2025-21956, CVE-2025-21909, CVE-2025-21955, CVE-2025-21918, CVE-2025-21960, CVE-2025-21915, CVE-2025-21992, CVE-2025-21914, CVE-2025-21877, CVE-2025-21875, CVE-2025-21928, CVE-2025-22013, CVE-2025-22014, CVE-2025-21950, CVE-2025-21948, CVE-2025-21912, CVE-2025-21944, CVE-2025-22004, CVE-2025-22009, CVE-2025-21968, CVE-2025-21888, CVE-2025-21980, CVE-2025-21911, CVE-2025-22017, CVE-2025-21975, CVE-2025-21930, CVE-2025-21947, CVE-2025-21908, CVE-2025-21994, CVE-2024-58090, CVE-2025-21910, CVE-2025-21959, CVE-2025-21977, CVE-2025-21903, CVE-2025-22016, CVE-2025-21976, CVE-2025-21898, CVE-2025-21986, CVE-2025-22011, CVE-2025-21905, CVE-2025-22015, CVE-2025-21996, CVE-2025-21966, CVE-2025-21883, CVE-2025-22010, CVE-2025-21904, CVE-2025-21916, CVE-2025-21935, CVE-2025-21924, CVE-2025-22005, CVE-2025-21962, CVE-2025-21917, CVE-2025-21920, CVE-2025-21997, CVE-2025-21880, CVE-2025-21926, CVE-2025-22007) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 LTS linux-image-6.8.1-1034-realtime 6.8.1-1034.35~22.04.1 Available with Ubuntu Pro linux-image-realtime-6.8.1 6.8.1-1034.35~22.04.1 Available with Ubuntu Pro linux-image-realtime-hwe-22.04 6.8.1-1034.35~22.04.1 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-7767-2 https://ubuntu.com/security/notices/USN-7767-1 CVE-2024-58090, CVE-2025-21872, CVE-2025-21873, CVE-2025-21875, CVE-2025-21877, CVE-2025-21878, CVE-2025-21880, CVE-2025-21881, CVE-2025-21883, CVE-2025-21885, CVE-2025-21888, CVE-2025-21889, CVE-2025-21890, CVE-2025-21891, CVE-2025-21892, CVE-2025-21894, CVE-2025-21895, CVE-2025-21898, CVE-2025-21899, CVE-2025-21903, CVE-2025-21904, CVE-2025-21905, CVE-2025-21908, CVE-2025-21909, CVE-2025-21910, CVE-2025-21911, CVE-2025-21912, CVE-2025-21913, CVE-2025-21914, CVE-2025-21915, CVE-2025-21916, CVE-2025-21917, CVE-2025-21918, CVE-2025-21919, CVE-2025-21920, CVE-2025-21922, CVE-2025-21924, CVE-2025-21925, CVE-2025-21926, CVE-2025-21927, CVE-2025-21928, CVE-2025-21929, CVE-2025-21930, CVE-2025-21934, CVE-2025-21935, CVE-2025-21936, CVE-2025-21937, CVE-2025-21941, CVE-2025-21944, CVE-2025-21945, CVE-2025-21946, CVE-2025-21947, CVE-2025-21948, CVE-2025-21950, CVE-2025-21951, CVE-2025-21955, CVE-2025-21956, CVE-2025-21957, CVE-2025-21959, CVE-2025-21960, CVE-2025-21961, CVE-2025-21962, CVE-2025-21963, CVE-2025-21964, CVE-2025-21966, CVE-2025-21967, CVE-2025-21968, CVE-2025-21969, CVE-2025-21970, CVE-2025-21972, CVE-2025-21975, CVE-2025-21976, CVE-2025-21977, CVE-2025-21978, CVE-2025-21979, CVE-2025-21980, CVE-2025-21981, CVE-2025-21982, CVE-2025-21986, CVE-2025-21991, CVE-2025-21992,CVE-2025-21994, CVE-2025-21995, CVE-2025-21996, CVE-2025-21997, CVE-2025-21999, CVE-2025-22001, CVE-2025-22003, CVE-2025-22004, CVE-2025-22005, CVE-2025-22007, CVE-2025-22008, CVE-2025-22009, CVE-2025-22010, CVE-2025-22011, CVE-2025-22013, CVE-2025-22014, CVE-2025-22015, CVE-2025-22016, CVE-2025-22017, CVE-2025-37889 Package Information: . A critical patch addresses several vulnerabilities within the Linux kernel for Ubuntu 22.04, prompting urgent attention from IT professionals.. Linux kernel security, Ubuntu 22.04 update, real-time system vulnerabilities. . Severity: Critical. LinuxSecurity.com Team

Sep 25, 2025 •Critical Ubuntu