USN-7921-2: Linux kernel (Real-time) vulnerabilities

USN-7921-2: Linux kernel (Real-time) vulnerabilities

Publication date: 19 December 2025
Overview: Several security issues were fixed in the Linux kernel.

Packages
linux-realtime-6.14 - 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:

• Cryptographic API;
• Media drivers;
• Netfilter;
• TLS protocol

Update instructions
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:

24.04 LTS noble

• linux-image-6.14.0-1017-realtime – 6.14.0-1017.17~24.04.1
• linux-image-realtime-6.14 – 6.14.0-1017.17~24.04.1
• linux-image-realtime-hwe-24.04 – 6.14.0-1017.17~24.04.1