A xen security update has been released for Debian GNU/Linux 11 to address multiple vulnerabilities that could result in privilege escalation, denial of service, or information leaks.

DSA 5378-1: xen security update

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Debian Security Advisory DSA-5378-1 security@debian.org
  https://www.debian.org/security/ Moritz Muehlenhoff
March 25, 2023   https://www.debian.org/security/faq
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Package : xen
CVE ID : CVE-2022-23824 CVE-2022-42331 CVE-2022-42332 CVE-2022-42333
CVE-2022-42334
Debian Bug : 1033297

Multiple vulnerabilities have been discovered in the Xen hypervisor,
which could result in privilege escalation, denial of service or
information leaks.

For the stable distribution (bullseye), these problems have been fixed in
version 4.14.5+94-ge49571868d-1.

We recommend that you upgrade your xen packages.

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

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/