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

USN-5493-2: Linux kernel (HWE) vulnerability

Publication date

1 July 2022

Overview

The system could be made to crash under certain conditions.

Releases

Packages

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
20.04 focal linux-image-5.13.0-52-generic-64k –  5.13.0-52.59~20.04.1
linux-image-generic-hwe-20.04 –  5.13.0.52.59~20.04.31
linux-image-generic-lpae-hwe-20.04 –  5.13.0.52.59~20.04.31
linux-image-virtual-hwe-20.04 –  5.13.0.52.59~20.04.31
linux-image-generic-64k-hwe-20.04 –  5.13.0.52.59~20.04.31
linux-image-5.13.0-52-generic-lpae –  5.13.0-52.59~20.04.1
linux-image-lowlatency-hwe-20.04 –  5.13.0.52.59~20.04.31
linux-image-5.13.0-52-generic –  5.13.0-52.59~20.04.1
linux-image-5.13.0-52-lowlatency –  5.13.0-52.59~20.04.1
18.04 bionic linux-image-oem-osp1 –  5.4.0.121.137~18.04.101
linux-image-generic-hwe-18.04-edge –  5.4.0.121.137~18.04.101
linux-image-generic-lpae-hwe-18.04 –  5.4.0.121.137~18.04.101
linux-image-snapdragon-hwe-18.04 –  5.4.0.121.137~18.04.101
linux-image-generic-hwe-18.04 –  5.4.0.121.137~18.04.101
linux-image-5.4.0-121-lowlatency –  5.4.0-121.137~18.04.1
linux-image-generic-lpae-hwe-18.04-edge –  5.4.0.121.137~18.04.101
linux-image-lowlatency-hwe-18.04 –  5.4.0.121.137~18.04.101
linux-image-virtual-hwe-18.04 –  5.4.0.121.137~18.04.101
linux-image-oem –  5.4.0.121.137~18.04.101
linux-image-snapdragon-hwe-18.04-edge –  5.4.0.121.137~18.04.101
linux-image-5.4.0-121-generic –  5.4.0-121.137~18.04.1
linux-image-lowlatency-hwe-18.04-edge –  5.4.0.121.137~18.04.101
linux-image-virtual-hwe-18.04-edge –  5.4.0.121.137~18.04.101
linux-image-5.4.0-121-generic-lpae –  5.4.0-121.137~18.04.1

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References

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