A libxml2 security update has been released for Debian GNU/Linux 10 LTS to address several vulnerabilities.

DLA 3405-1: libxml2 security update

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Debian LTS Advisory DLA-3405-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Thorsten Alteholz
April 30, 2023   https://wiki.debian.org/LTS
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Package : libxml2
Version : 2.9.4+dfsg1-7+deb10u6
CVE ID : CVE-2023-28484 CVE-2023-29469

Several vulnerabilities were discovered in libxml2, a library providing
support to read, modify and write XML and HTML files.

CVE-2023-28484

A NULL pointer dereference flaw when parsing invalid XML schemas may
result in denial of service.

CVE-2023-29469

It was reported that when hashing empty strings which aren't
null-terminated, xmlDictComputeFastKey could produce inconsistent
results, which may lead to various logic or memory errors.

For Debian 10 buster, these problems have been fixed in version
2.9.4+dfsg1-7+deb10u6.

We recommend that you upgrade your libxml2 packages.

For the detailed security status of libxml2 please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/libxml2

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