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 stable distribution (bookworm), these problems have been fixed in version 2:21.1.7-3+deb12u9.
We recommend that you upgrade your xorg-server packages.
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/