Ubuntu 25.10 Linux Kernel Critical Security Issue CVE-2025-40019

ubuntu

February 4, 2026

Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

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

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

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

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-raspi: Linux kernel for Raspberry Pi systems

- linux-realtime: Linux kernel for Real-time systems

- linux-oem-6.17: Linux kernel for OEM 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:

- Cryptographic API;

- Unix domain sockets;

(CVE-2025-40019, CVE-2025-40214)

Topics Covered

security advisory security issue critical Ubuntu system compromise Linux kernel

Update Instructions

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

Ubuntu 25.10
   linux-image-6.17.0-1005-realtime  6.17.0-1005.6
   linux-image-6.17.0-1006-aws     6.17.0-1006.6
   linux-image-6.17.0-1006-aws-64k  6.17.0-1006.6
   linux-image-6.17.0-1006-gcp     6.17.0-1006.6
   linux-image-6.17.0-1006-gcp-64k  6.17.0-1006.6
   linux-image-6.17.0-1006-oracle  6.17.0-1006.6
   linux-image-6.17.0-1006-oracle-64k  6.17.0-1006.6
   linux-image-6.17.0-1007-azure   6.17.0-1007.7
   linux-image-6.17.0-1007-raspi   6.17.0-1007.7
   linux-image-6.17.0-12-generic   6.17.0-12.12
   linux-image-6.17.0-12-generic-64k  6.17.0-12.12
   linux-image-aws                 6.17.0-1006.6
   linux-image-aws-6.17            6.17.0-1006.6
   linux-image-aws-64k             6.17.0-1006.6
   linux-image-aws-64k-6.17        6.17.0-1006.6
   linux-image-azure               6.17.0-1007.7
   linux-image-azure-6.17          6.17.0-1007.7
   linux-image-gcp                 6.17.0-1006.6
   linux-image-gcp-6.17            6.17.0-1006.6
   linux-image-gcp-64k             6.17.0-1006.6
   linux-image-gcp-64k-6.17        6.17.0-1006.6
   linux-image-generic             6.17.0-12.12
   linux-image-generic-6.17        6.17.0-12.12
   linux-image-generic-64k         6.17.0-12.12
   linux-image-generic-64k-6.17    6.17.0-12.12
   linux-image-oracle              6.17.0-1006.6
   linux-image-oracle-6.17         6.17.0-1006.6
   linux-image-oracle-64k          6.17.0-1006.6
   linux-image-oracle-64k-6.17     6.17.0-1006.6
   linux-image-raspi               6.17.0-1007.7
   linux-image-raspi-6.17          6.17.0-1007.7
   linux-image-realtime            6.17.0-1005.6
   linux-image-realtime-6.17       6.17.0-1005.6
   linux-image-virtual             6.17.0-12.12
   linux-image-virtual-6.17        6.17.0-12.12

Ubuntu 24.04 LTS
   linux-image-6.17.0-1010-oem     6.17.0-1010.10
   linux-image-oem-24.04d          6.17.0-1010.10
   linux-image-oem-6.17            6.17.0-1010.10

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.