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[SECURITY] [DLA 3172-1] libxml2 security update

Debian LTS Advisory DLA-3172-1                debian-lts@lists.debian.org
https://www.debian.org/lts/security/                      Markus Koschany
October 30, 2022                              https://wiki.debian.org/LTS

Package        : libxml2
Version        : 2.9.4+dfsg1-7+deb10u5
CVE ID         : CVE-2022-40303 CVE-2022-40304
Debian Bug     : 1022224 1022225

It was discovered that libxml2, the GNOME XML library, was vulnerable to
integer overflows and memory corruption.


     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


     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

We recommend that you upgrade your libxml2 packages.

For the detailed security status of libxml2 please refer to
its security tracker page at:

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

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