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[USN-7852-1] libxml2 vulnerability

Posted on 30 October 2025
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-7852-1
October 30, 2025

libxml2 vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.04
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

libxml2 could be made to crash or run programs if it opened a specially
crafted file.

Software Description:
- libxml2: GNOME XML library

Details:

It was discovered that libxslt, used by libxml2, incorrectly handled
certain attributes. An attacker could use this issue to cause a crash,
resulting in a denial of service, or possibly execute arbitrary code. This
update adds a fix to libxml2 to mitigate the libxslt vulnerability.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 25.04
libxml2 2.12.7+dfsg+really2.9.14-0.4ubuntu0.4
python3-libxml2 2.12.7+dfsg+really2.9.14-0.4ubuntu0.4

Ubuntu 24.04 LTS
libxml2 2.9.14+dfsg-1.3ubuntu3.6
python3-libxml2 2.9.14+dfsg-1.3ubuntu3.6

Ubuntu 22.04 LTS
libxml2 2.9.13+dfsg-1ubuntu0.10
python3-libxml2 2.9.13+dfsg-1ubuntu0.10

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-7852-1
CVE-2025-7425

Package Information:
https://launchpad.net/ubuntu/+source/libxml2/2.12.7+dfsg+really2.9.14-0.4ubuntu0.4
https://launchpad.net/ubuntu/+source/libxml2/2.9.14+dfsg-1.3ubuntu3.6
https://launchpad.net/ubuntu/+source/libxml2/2.9.13+dfsg-1ubuntu0.10

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