1. Ubuntu Security Notices
  2. USN-6645-1

USN-6645-1: Linux kernel vulnerability

Publication date

20 February 2024

Overview

The system could be made to stop responding under certain conditions.

Releases

Packages

Details

It was discovered that the netfilter connection tracker for netlink in the
Linux kernel did not properly perform reference counting in some error
conditions. A local attacker could possibly use this to cause a denial of
service (memory exhaustion).

It was discovered that the netfilter connection tracker for netlink in the
Linux kernel did not properly perform reference counting in some error
conditions. A local attacker could possibly use this to cause a denial of
service (memory exhaustion).

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
14.04 trusty linux-image-3.13.0-196-generic –  3.13.0-196.247  
linux-image-3.13.0-196-lowlatency –  3.13.0-196.247  
linux-image-generic –  3.13.0.196.206  
linux-image-generic-lts-trusty –  3.13.0.196.206  
linux-image-lowlatency –  3.13.0.196.206  
linux-image-server –  3.13.0.196.206  
linux-image-virtual –  3.13.0.196.206  

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References

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