1. Ubuntu Security Notices
  2. USN-5493-1

USN-5493-1: Linux kernel vulnerability

Publication date

27 June 2022

Overview

The system could be made to crash under certain conditions.

Releases

Packages

  • linux - Linux kernel
  • linux-hwe - Linux hardware enablement (HWE) kernel

Details

It was discovered that the 8 Devices USB2CAN interface implementation in
the Linux kernel did not properly handle certain error conditions, leading
to a double-free. A local attacker could possibly use this to cause a
denial of service (system crash).

It was discovered that the 8 Devices USB2CAN interface implementation in
the Linux kernel did not properly handle certain error conditions, leading
to a double-free. A local 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
21.10 impish linux-image-5.13.0-52-generic-64k –  5.13.0-52.59
linux-image-virtual –  5.13.0.52.58
linux-image-generic-64k –  5.13.0.52.58
linux-image-generic –  5.13.0.52.58
linux-image-5.13.0-52-lowlatency –  5.13.0-52.59
linux-image-5.13.0-52-generic-lpae –  5.13.0-52.59
linux-image-oem-20.04 –  5.13.0.52.58
linux-image-5.13.0-52-generic –  5.13.0-52.59
linux-image-generic-lpae –  5.13.0.52.58
linux-image-lowlatency –  5.13.0.52.58
20.04 focal linux-image-virtual –  5.4.0.121.122
linux-image-generic –  5.4.0.121.122
linux-image-oem –  5.4.0.121.122
linux-image-oem-osp1 –  5.4.0.121.122
linux-image-5.4.0-121-generic –  5.4.0-121.137
linux-image-5.4.0-121-generic-lpae –  5.4.0-121.137
linux-image-5.4.0-121-lowlatency –  5.4.0-121.137
linux-image-generic-lpae –  5.4.0.121.122
linux-image-lowlatency –  5.4.0.121.122
18.04 bionic linux-image-4.15.0-188-generic-lpae –  4.15.0-188.199
linux-image-virtual –  4.15.0.188.173
linux-image-generic –  4.15.0.188.173
linux-image-4.15.0-188-lowlatency –  4.15.0-188.199
linux-image-4.15.0-188-generic –  4.15.0-188.199
linux-image-generic-lpae –  4.15.0.188.173
linux-image-lowlatency –  4.15.0.188.173
16.04 xenial linux-image-4.15.0-188-lowlatency –  4.15.0-188.199~16.04.1  
linux-image-lowlatency-hwe-16.04 –  4.15.0.188.175  
linux-image-4.15.0-188-generic –  4.15.0-188.199~16.04.1  
linux-image-virtual-hwe-16.04 –  4.15.0.188.175  
linux-image-oem –  4.15.0.188.175  
linux-image-generic-hwe-16.04 –  4.15.0.188.175  

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References

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