[USN-5783-1] Linux kernel (OEM) vulnerability

[Rodrigo Figueiredo Zaiden]

==========================================================================
Ubuntu Security Notice USN-5783-1
December 16, 2022

linux-oem-5.17 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-5.17: Linux kernel for OEM systems

Details:

Tamás Koczka discovered that the Bluetooth L2CAP handshake implementation
in the Linux kernel contained multiple use-after-free vulnerabilities. A
physically proximate 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-5.17.0-1025-oem     5.17.0-1025.26
   linux-image-oem-22.04           5.17.0.1025.23
   linux-image-oem-22.04a          5.17.0.1025.23

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-5783-1
   CVE-2022-42896

Package Information:
   https://launchpad.net/ubuntu/+source/linux-oem-5.17/5.17.0-1025.26
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