A xen security update has been released for Debian GNU/Linux 11 to address multiple vulnerabilities.

DSA 5272-1: xen security update

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Debian Security Advisory DSA-5272-1 security@debian.org
  https://www.debian.org/security/ Moritz Muehlenhoff
November 06, 2022   https://www.debian.org/security/faq
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Package : xen
CVE ID : CVE-2022-33745 CVE-2022-33746 CVE-2022-33747 CVE-2022-33748
CVE-2022-42309 CVE-2022-42310 CVE-2022-42311 CVE-2022-42312
CVE-2022-42313 CVE-2022-42314 CVE-2022-42315 CVE-2022-42316
CVE-2022-42317 CVE-2022-42318 CVE-2022-42319 CVE-2022-42320
CVE-2022-42321 CVE-2022-42322 CVE-2022-42323 CVE-2022-42324
CVE-2022-42325 CVE-2022-42326

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+86-g1c354767d5-1.

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/