1. Ubuntu Security Notices
  2. USN-7835-1

USN-7835-1: Linux kernel vulnerabilities

Publication date

22 October 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:

  • ARM64 architecture;
  • PowerPC architecture;
  • x86 architecture;
  • ACPI drivers;
  • Ublk userspace block driver;
  • Clock framework and drivers;
  • GPU drivers;
  • 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;
  • RDMA verbs API;
  • Kernel fork()...

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;
  • ACPI drivers;
  • Ublk userspace block driver;
  • Clock framework and drivers;
  • GPU drivers;
  • 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;
  • RDMA verbs API;
  • Kernel fork() syscall;
  • Tracing infrastructure;
  • Watch queue notification mechanism;
  • 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

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
24.04 LTS noble linux-image-6.8.0-1025-gkeop –  6.8.0-1025.28
linux-image-6.8.0-1038-oracle –  6.8.0-1038.39
linux-image-6.8.0-1038-oracle-64k –  6.8.0-1038.39
linux-image-6.8.0-1039-ibm –  6.8.0-1039.39
linux-image-6.8.0-1041-aws –  6.8.0-1041.43
linux-image-6.8.0-1041-aws-64k –  6.8.0-1041.43
linux-image-6.8.0-1041-azure –  6.8.0-1041.47+1
linux-image-6.8.0-1042-gcp –  6.8.0-1042.45
linux-image-6.8.0-1042-gcp-64k –  6.8.0-1042.45
linux-image-6.8.0-86-generic –  6.8.0-86.87
linux-image-6.8.0-86-generic-64k –  6.8.0-86.87
linux-image-6.8.0-86-lowlatency –  6.8.0-86.87.1
linux-image-6.8.0-86-lowlatency-64k –  6.8.0-86.87.1
linux-image-aws-6.8 –  6.8.0-1041.43
linux-image-aws-64k-6.8 –  6.8.0-1041.43
linux-image-aws-64k-lts-24.04 –  6.8.0-1041.43
linux-image-aws-lts-24.04 –  6.8.0-1041.43
linux-image-azure-6.8 –  6.8.0-1041.47+1
linux-image-azure-lts-24.04 –  6.8.0-1041.47+1
linux-image-gcp-6.8 –  6.8.0-1042.45
linux-image-gcp-64k-6.8 –  6.8.0-1042.45
linux-image-gcp-64k-lts-24.04 –  6.8.0-1042.45
linux-image-gcp-lts-24.04 –  6.8.0-1042.45
linux-image-generic –  6.8.0-86.87
linux-image-generic-6.8 –  6.8.0-86.87
linux-image-generic-64k –  6.8.0-86.87
linux-image-generic-64k-6.8 –  6.8.0-86.87
linux-image-generic-lpae –  6.8.0-86.87
linux-image-gkeop –  6.8.0-1025.28
linux-image-gkeop-6.8 –  6.8.0-1025.28
linux-image-ibm –  6.8.0-1039.39
linux-image-ibm-6.8 –  6.8.0-1039.39
linux-image-ibm-classic –  6.8.0-1039.39
linux-image-ibm-lts-24.04 –  6.8.0-1039.39
linux-image-kvm –  6.8.0-86.87
linux-image-lowlatency –  6.8.0-86.87.1
linux-image-lowlatency-6.8 –  6.8.0-86.87.1
linux-image-lowlatency-64k –  6.8.0-86.87.1
linux-image-lowlatency-64k-6.8 –  6.8.0-86.87.1
linux-image-oracle-6.8 –  6.8.0-1038.39
linux-image-oracle-64k-6.8 –  6.8.0-1038.39
linux-image-oracle-64k-lts-24.04 –  6.8.0-1038.39
linux-image-oracle-lts-24.04 –  6.8.0-1038.39
linux-image-virtual –  6.8.0-86.87
linux-image-virtual-6.8 –  6.8.0-86.87
22.04 LTS jammy linux-image-6.8.0-1039-ibm –  6.8.0-1039.39~22.04.1
linux-image-6.8.0-1041-azure –  6.8.0-1041.47~22.04.1
linux-image-6.8.0-86-lowlatency –  6.8.0-86.87.1~22.04.1
linux-image-6.8.0-86-lowlatency-64k –  6.8.0-86.87.1~22.04.1
linux-image-azure –  6.8.0-1041.47~22.04.1
linux-image-azure-6.8 –  6.8.0-1041.47~22.04.1
linux-image-ibm-6.8 –  6.8.0-1039.39~22.04.1
linux-image-lowlatency-6.8 –  6.8.0-86.87.1~22.04.1
linux-image-lowlatency-64k-6.8 –  6.8.0-86.87.1~22.04.1
linux-image-lowlatency-64k-hwe-22.04 –  6.8.0-86.87.1~22.04.1
linux-image-lowlatency-hwe-22.04 –  6.8.0-86.87.1~22.04.1

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References

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