1. Ubuntu Security Notices
  2. USN-5590-1

USN-5590-1: Linux kernel (OEM) vulnerability

Publication date

30 August 2022

Overview

The system could be made to crash if it received specially crafted network traffic.

Releases

Packages

Details

Domingo Dirutigliano and Nicola Guerrera discovered that the netfilter
subsystem in the Linux kernel did not properly handle rules that truncated
packets below the packet header size. When such rules are in place, a
remote attacker could possibly use this to cause a denial of service
(system crash).

Domingo Dirutigliano and Nicola Guerrera discovered that the netfilter
subsystem in the Linux kernel did not properly handle rules that truncated
packets below the packet header size. When such rules are in place, a
remote attacker could possibly use this to cause a denial of service
(system crash).

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
20.04 focal linux-image-oem-20.04c –  5.14.0.1050.46
linux-image-oem-20.04b –  5.14.0.1050.46
linux-image-oem-20.04d –  5.14.0.1050.46
linux-image-oem-20.04 –  5.14.0.1050.46
linux-image-5.14.0-1050-oem –  5.14.0-1050.57

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References

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