A zlib security update has been released for Debian GNU/Linux 11 to address a heap-based buffer overflow vulnerability.

DSA 5218-1: zlib security update

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Debian Security Advisory DSA-5218-1 security@debian.org
  https://www.debian.org/security/ Salvatore Bonaccorso
August 25, 2022   https://www.debian.org/security/faq
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Package : zlib
CVE ID : CVE-2022-37434
Debian Bug : 1016710

Evgeny Legerov reported a heap-based buffer overflow vulnerability in
the inflate operation in zlib, which could result in denial of service
or potentially the execution of arbitrary code if specially crafted
input is processed.

For the stable distribution (bullseye), this problem has been fixed in
version 1:1.2.11.dfsg-2+deb11u2.

We recommend that you upgrade your zlib packages.

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

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/