An expat security update has been released for Debian GNU/Linux 9 LTS to address multiple security vulnerabilities.

DLA 2904-1: expat security update

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Debian LTS Advisory DLA-2904-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Markus Koschany
January 30, 2022 https://wiki.debian.org/LTS
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Package : expat
Version : 2.2.0-2+deb9u4
CVE ID : CVE-2021-45960 CVE-2021-46143 CVE-2022-22822 CVE-2022-22823
CVE-2022-22824 CVE-2022-22825 CVE-2022-22826 CVE-2022-22827
CVE-2022-23852 CVE-2022-23990
Debian Bug : 1002994 1003474

Multiple security vulnerabilities have been discovered in Expat, the XML
parsing C library. Integer overflows or invalid shifts may lead to a denial
of service or other unspecified impact.

For Debian 9 stretch, these problems have been fixed in version
2.2.0-2+deb9u4.

We recommend that you upgrade your expat packages.

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

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS