Ubuntu Security Notice USN-5493-2 – Torchsec
Ubuntu Security Notice USN-5493-2
July 01, 2022
linux-hwe-5.13 vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.04 LTS
Summary:
The system could be made to crash under certain conditions.
Software Description:
- linux-hwe-5.13: 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).
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 20.04 LTS:
linux-image-5.13.0-52-generic 5.13.0-52.59~20.04.1
linux-image-5.13.0-52-generic-64k 5.13.0-52.59~20.04.1
linux-image-5.13.0-52-generic-lpae 5.13.0-52.59~20.04.1
linux-image-5.13.0-52-lowlatency 5.13.0-52.59~20.04.1
linux-image-generic-64k-hwe-20.04 5.13.0.52.59~20.04.31
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-lowlatency-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
After a standard system update you need to reboot your computer to make
all the necessary changes.
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.
References:
https://ubuntu.com/security/notices/USN-5493-2
https://ubuntu.com/security/notices/USN-5493-1
CVE-2022-28388
Package Information:
https://launchpad.net/ubuntu/+source/linux-hwe-5.13/5.13.0-52.59~20.04.1
Gloss