Ubuntu alert USN-8043-1 (gnutls28)

From:
             
 
noreply+usn-bot@canonical.com
To:
             
 
ubuntu-security-announce@lists.ubuntu.com
Subject:
             
 
[USN-8043-1] GnuTLS vulnerabilities
Date:
             
 
Mon, 16 Feb 2026 16:28:48 +0000
Message-ID:
             
 
<E1vs1Sq-00032E-Te@lists.ubuntu.com>
==========================================================================
Ubuntu Security Notice USN-8043-1
February 16, 2026

gnutls28 vulnerabilities
==========================================================================

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

- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in GnuTLS.

Software Description:
- gnutls28: GNU TLS library

Details:

Tim Scheckenbach discovered that GnuTLS incorrectly handled malicious
certificates containing a large number of name constraints and subject
alternative names. A remote attacker could possibly use this issue to
cause GnuTLS to consume resources, resulting in a denial of service.
(CVE-2025-14831)

Luigino Camastra discovered that GnuTLS incorrectly handled certain PKCS11
token labels. A remote attacker could use this issue to cause GnuTLS to
crash, resulting in a denial of service, or possibly execute arbitrary
code. The default compiler options for affected releases should reduce the
vulnerability to a denial of service. (CVE-2025-9820)

Update instructions:

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

Ubuntu 25.10
  libgnutls30t64                  3.8.9-3ubuntu2.1

Ubuntu 24.04 LTS
  libgnutls30t64                  3.8.3-1.1ubuntu3.5

Ubuntu 22.04 LTS
  libgnutls30                     3.7.3-4ubuntu1.8

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

References:
  https://ubuntu.com/security/notices/USN-8043-1
  CVE-2025-14831, CVE-2025-9820

Package Information:
  https://launchpad.net/ubuntu/+source/gnutls28/3.8.9-3ubun...
  https://launchpad.net/ubuntu/+source/gnutls28/3.8.3-1.1ub...
  https://launchpad.net/ubuntu/+source/gnutls28/3.7.3-4ubun...


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