1. Ubuntu Security Notices
  2. USN-7767-2

USN-7767-2: Linux kernel (Real-time) vulnerabilities

Publication date

25 September 2025

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

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...

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;
  • Wireless networking;
  • eXpress Data Path

Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

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.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
22.04 jammy linux-image-6.8.1-1034-realtime –  6.8.1-1034.35~22.04.1  
linux-image-realtime-6.8.1 –  6.8.1-1034.35~22.04.1  
linux-image-realtime-hwe-22.04 –  6.8.1-1034.35~22.04.1  

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References

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