An expat security update has been released for Debian GNU/Linux 10 to address a heap use-after-free vulnerability.

DLA 3119-1: expat security update

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Debian LTS Advisory DLA-3119-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Thorsten Alteholz
September 25, 2022   https://wiki.debian.org/LTS
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Package : expat
Version : 2.2.6-2+deb10u5
CVE ID : CVE-2022-40674

Rhodri James discovered a heap use-after-free vulnerability in the
doContent function in Expat, an XML parsing C library, which could result
in denial of service or potentially the execution of arbitrary code, if a
malformed XML file is processed.

For Debian 10 buster, this problem has been fixed in version
2.2.6-2+deb10u5.

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