A bind9 security update has been released for Debian GNU/Linux 11 to address several vulnerabilities that may result in denial of service against named.

DSA 5329-1: bind9 security update

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Debian Security Advisory DSA-5329-1 security@debian.org
  https://www.debian.org/security/ Moritz Muehlenhoff
January 26, 2023   https://www.debian.org/security/faq
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Package : bind9
CVE ID : CVE-2022-3094 CVE-2022-3736 CVE-2022-3924

Several vulnerabilities were discovered in BIND, a DNS server
implementation, which may result in denial of service against named.

For the stable distribution (bullseye), these problems have been fixed in
version 1:9.16.37-1~deb11u1.

We recommend that you upgrade your bind9 packages.

For the detailed security status of bind9 please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/bind9

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/