Debian 10: DLA-3172-1 Critical: Libxml2 Integer Overflow and Memory Error

Parsing a XML document with the XML_PARSE_HUGE option enabled can result
in an integer overflow because safety checks were missing in some
functions. Also, the xmlParseEntityValue function did not have any length
limitation.

CVE-2022-40304

When a reference cycle is detected in the XML entity cleanup function the
XML entity data can be stored in a dictionary. In this case, the
dictionary becomes corrupted resulting in logic errors, including memory
errors like double free.

For Debian 10 buster, these problems have been fixed in version
2.9.4+dfsg1-7+deb10u5.

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/source-package/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