[USN-6576-1] Linux kernel (OEM) vulnerability

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==========================================================================
Ubuntu Security Notice USN-6576-1
January 10, 2024

linux-oem-6.1 vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS

Summary:

The system could be made to crash or run programs as an administrator.

Software Description:
- linux-oem-6.1: Linux kernel for OEM systems

Details:

Lonial Con discovered that the netfilter subsystem in the Linux kernel did
not properly handle an expired catchall element in some situations, leading
to a use-after-free vulnerability. A local attacker could use this to cause
a denial of service (system crash) or possibly execute arbitrary code.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS:
linux-image-6.1.0-1028-oem 6.1.0-1028.28
linux-image-oem-22.04 6.1.0.1028.29
linux-image-oem-22.04a 6.1.0.1028.29
linux-image-oem-22.04b 6.1.0.1028.29
linux-image-oem-22.04c 6.1.0.1028.29

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-6576-1
CVE-2023-6111

Package Information:
https://launchpad.net/ubuntu/+source/linux-oem-6.1/6.1.0-1028.28