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[USN-8460-1] libxml2 vulnerabilities

Posted on 22 June 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8460-1
June 22, 2026

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

- Ubuntu 26.04 LTS
- Ubuntu 25.10

Summary:

Several security issues were fixed in libxml2.

Software Description:
- libxml2: GNOME XML library

Details:

It was discovered that libxml2 did not properly release memory allocated in
the xmllint utility. An attacker could possibly use this issue to cause a
denial of service. (CVE-2026-1757)

A type confusion vulnerability was found in libxml2 when processing a
specially crafted XML document. A remote attacker could possibly use this
issue to cause a denial of service. (CVE-2026-6732)

Update instructions:

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

Ubuntu 26.04 LTS
libxml2-16 2.15.2+dfsg-0.1ubuntu0.1
libxml2-dev 2.15.2+dfsg-0.1ubuntu0.1
libxml2-source 2.15.2+dfsg-0.1ubuntu0.1
libxml2-utils 2.15.2+dfsg-0.1ubuntu0.1
python3-libxml2 2.15.2+dfsg-0.1ubuntu0.1

Ubuntu 25.10
libxml2-16 2.14.5+dfsg-0.2ubuntu0.2
libxml2-dev 2.14.5+dfsg-0.2ubuntu0.2
libxml2-utils 2.14.5+dfsg-0.2ubuntu0.2
python3-libxml2 2.14.5+dfsg-0.2ubuntu0.2

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

References:
https://ubuntu.com/security/notices/USN-8460-1
CVE-2026-1757, CVE-2026-6732

Package Information:
https://launchpad.net/ubuntu/+source/libxml2/2.15.2+dfsg-0.1ubuntu0.1
https://launchpad.net/ubuntu/+source/libxml2/2.14.5+dfsg-0.2ubuntu0.2

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