A xorg-server security update has been released for Debian GNU/Linux 11 and 12 to address several vulnerabilities that may result in privilege escalation if the X server is running privileged.

[SECURITY] [DSA 5534-1] xorg-server security update

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Debian Security Advisory DSA-5534-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
October 25, 2023 https://www.debian.org/security/faq
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Package : xorg-server
CVE ID : CVE-2023-5367 CVE-2023-5380

Jan-Niklas Sohn discovered several vulnerabilities in the Xorg X server,
which may result in privilege escalation if the X server is running
privileged.

For the oldstable distribution (bullseye), these problems have been fixed
in version 2:1.20.11-1+deb11u8.

For the stable distribution (bookworm), these problems have been fixed in
version 2:21.1.7-3+deb12u2.

We recommend that you upgrade your xorg-server packages.

For the detailed security status of xorg-server please refer to its
security tracker page at:
https://security-tracker.debian.org/tracker/xorg-server

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/