1. Ubuntu Security Notices
  2. USN-5588-1

USN-5588-1: Linux kernel vulnerability

Publication date

30 August 2022

Overview

The system could be made to crash or run programs as an administrator.

Releases

Packages

Details

Zhenpeng Lin discovered that the network packet scheduler implementation in
the Linux kernel did not properly remove all references to a route filter
before freeing it in some situations. A local attacker could use this to
cause a denial of service (system crash) or execute arbitrary code.

Zhenpeng Lin discovered that the network packet scheduler implementation in
the Linux kernel did not properly remove all references to a route filter
before freeing it in some situations. A local attacker could use this to
cause a denial of service (system crash) or execute arbitrary code.

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-server –  3.13.0.191.201  
linux-image-3.13.0-191-generic –  3.13.0-191.242  
linux-image-3.13.0-191-lowlatency –  3.13.0-191.242  
linux-image-virtual –  3.13.0.191.201  
linux-image-generic –  3.13.0.191.201  
linux-image-lowlatency –  3.13.0.191.201  

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References

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