Ubuntu 24.04/24.10: USN-7489-1 critical: Linux kernel crash risk

ubuntu

May 6, 2025

The system could be made to crash under certain conditions.

Summary

The system could be made to crash under certain conditions.

Software Description:

- linux: Linux kernel

- linux-aws: Linux kernel for Amazon Web Services (AWS) systems

- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems

- linux-lowlatency: Linux low latency kernel

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-raspi: Linux kernel for Raspberry Pi systems

- linux-gcp-6.11: Linux kernel for Google Cloud Platform (GCP) systems

- linux-hwe-6.11: Linux hardware enablement (HWE) kernel

- linux-lowlatency-hwe-6.11: Linux low latency kernel

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 subsystems:

- Timer subsystem;

(CVE-2025-21813)

Topics Covered

security advisory critical Ubuntu system update kernel crash timer issue

Update Instructions

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

Ubuntu 24.10
  linux-image-6.11.0-1012-raspi   6.11.0-1012.12
  linux-image-6.11.0-1013-aws     6.11.0-1013.14
  linux-image-6.11.0-1013-lowlatency  6.11.0-1013.14
  linux-image-6.11.0-1013-lowlatency-64k  6.11.0-1013.14
  linux-image-6.11.0-1014-gcp     6.11.0-1014.14
  linux-image-6.11.0-1014-gcp-64k  6.11.0-1014.14
  linux-image-6.11.0-1015-oracle  6.11.0-1015.16
  linux-image-6.11.0-1015-oracle-64k  6.11.0-1015.16
  linux-image-6.11.0-25-generic   6.11.0-25.25
  linux-image-6.11.0-25-generic-64k  6.11.0-25.25
  linux-image-aws                 6.11.0-1013.14
  linux-image-gcp                 6.11.0-1014.14
  linux-image-gcp-64k             6.11.0-1014.14
  linux-image-generic             6.11.0-25.25
  linux-image-generic-64k         6.11.0-25.25
  linux-image-lowlatency          6.11.0-1013.14
  linux-image-lowlatency-64k      6.11.0-1013.14
  linux-image-oracle              6.11.0-1015.16
  linux-image-oracle-64k          6.11.0-1015.16
  linux-image-raspi               6.11.0-1012.12
  linux-image-virtual             6.11.0-25.25

Ubuntu 24.04 LTS
  linux-image-6.11.0-1013-lowlatency  6.11.0-1013.14~24.04.1
  linux-image-6.11.0-1013-lowlatency-64k  6.11.0-1013.14~24.04.1
  linux-image-6.11.0-1014-gcp     6.11.0-1014.14~24.04.1
  linux-image-6.11.0-1014-gcp-64k  6.11.0-1014.14~24.04.1
  linux-image-6.11.0-25-generic   6.11.0-25.25~24.04.1
  linux-image-6.11.0-25-generic-64k  6.11.0-25.25~24.04.1
  linux-image-gcp                 6.11.0-1014.14~24.04.1
  linux-image-gcp-64k             6.11.0-1014.14~24.04.1
  linux-image-generic-64k-hwe-24.04  6.11.0-25.25~24.04.1
  linux-image-generic-hwe-24.04   6.11.0-25.25~24.04.1
  linux-image-lowlatency-64k-hwe-24.04  6.11.0-1013.14~24.04.1
  linux-image-lowlatency-hwe-24.04  6.11.0-1013.14~24.04.1
  linux-image-virtual-hwe-24.04   6.11.0-25.25~24.04.1

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.