==========================================================================
Ubuntu Security Notice USN-8022-2
February 16, 2026

expat vulnerabilities
==========================================================================

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

- Ubuntu 24.04 LTS

Summary:

Several security issues were fixed in Expat.

Software Description:
- expat: XML parsing C library

Details:

USN-8022-1 fixed vulnerabilities in Expat. This update provides the
corresponding updates for Ubuntu 24.04 LTS.

Original advisory details:

 It was discovered that Expat incorrectly handled the initialization of parsers
 for external entities. An attacker could possibly use this issue to cause a
 denial of service. (CVE-2026-24515)

 It was discovered that Expat incorrectly handled integer calculations when
 allocating memory for XML tags. An attacker could possibly use this issue to
 cause a denial of service or execute arbitrary code. (CVE-2026-25210)

Update instructions:

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

Ubuntu 24.04 LTS
  expat                           2.6.1-2ubuntu0.4
  libexpat1                       2.6.1-2ubuntu0.4

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

References:
  https://ubuntu.com/security/notices/USN-8022-2
  https://ubuntu.com/security/notices/USN-8022-1
  CVE-2026-24515, CVE-2026-25210

Package Information:
  https://launchpad.net/ubuntu/+source/expat/2.6.1-2ubuntu0.4