1. Ubuntu Security Notices
  2. USN-5266-1

USN-5266-1: Linux kernel (GKE) vulnerabilities

Publication date

3 February 2022

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

  • linux-gke - Linux kernel for Google Container Engine (GKE) systems
  • linux-gke-5.4 - Linux kernel for Google Container Engine (GKE) systems

Details

It was discovered that the Packet network protocol implementation in the
Linux kernel contained a double-free vulnerability. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2021-22600)

Luo Likang discovered that the FireDTV Firewire driver in the Linux kernel
did not properly perform bounds checking in some situations. A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2021-42739)

It was discovered that the Packet network protocol implementation in the
Linux kernel contained a double-free vulnerability. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2021-22600)

Luo Likang discovered that the FireDTV Firewire driver in the Linux kernel
did not properly perform bounds checking in some situations. A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2021-42739)

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-gke –  5.4.0.1061.71
linux-image-gke-5.4 –  5.4.0.1061.71
linux-image-5.4.0-1061-gke –  5.4.0-1061.64
18.04 bionic linux-image-gke-5.4 –  5.4.0.1061.64~18.04.25
linux-image-5.4.0-1061-gke –  5.4.0-1061.64~18.04.1

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References

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