[USN-7852-2] libxml2 vulnerability

[noreply+usn-bot at canonical.com]

==========================================================================
Ubuntu Security Notice USN-7852-2
November 27, 2025

libxml2 vulnerability
==========================================================================

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

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 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:

USN-7582-1 fixed a vulnerability in libxml2. This update provides the
corresponding fix for Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and
Ubuntu 20.04 LTS.

Original advisory 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 20.04 LTS
  libxml2                         2.9.10+dfsg-5ubuntu0.20.04.10+esm3
                                  Available with Ubuntu Pro
  python-libxml2                  2.9.10+dfsg-5ubuntu0.20.04.10+esm3
                                  Available with Ubuntu Pro
  python3-libxml2                 2.9.10+dfsg-5ubuntu0.20.04.10+esm3
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  libxml2                         2.9.4+dfsg1-6.1ubuntu1.9+esm6
                                  Available with Ubuntu Pro
  python-libxml2                  2.9.4+dfsg1-6.1ubuntu1.9+esm6
                                  Available with Ubuntu Pro
  python3-libxml2                 2.9.4+dfsg1-6.1ubuntu1.9+esm6
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  libxml2                         2.9.3+dfsg1-1ubuntu0.7+esm11
                                  Available with Ubuntu Pro
  python-libxml2                  2.9.3+dfsg1-1ubuntu0.7+esm11
                                  Available with Ubuntu Pro

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

References:
  https://ubuntu.com/security/notices/USN-7852-2
  https://ubuntu.com/security/notices/USN-7852-1
  CVE-2025-7425
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: OpenPGP digital signature
URL: <https://lists.ubuntu.com/archives/ubuntu-security-announce/attachments/20251127/526e172f/attachment.sig>