[USN-8356-1] GNU SASL vulnerability

[noreply+usn-bot at canonical.com]

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Ubuntu Security Notice USN-8356-1
June 01, 2026

gsasl vulnerability
==========================================================================

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

- Ubuntu 26.04 LTS
- Ubuntu 25.10
- Ubuntu 24.04 LTS

Summary:

GNU SASL could be made to crash if it received specially crafted input.

Software Description:
- gsasl: Simple Authentication and Security Layer framework

Details:

It was discovered that GNU SASL did not properly handle certain DIGEST-MD5
tokens. An attacker could possibly use this issue to cause GNU SASL to
crash, resulting in a denial of service.

Update instructions:

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

Ubuntu 26.04 LTS
  gsasl                           2.2.2-4ubuntu1.1
  libgsasl18                      2.2.2-4ubuntu1.1

Ubuntu 25.10
  gsasl                           2.2.2-2ubuntu1.1
  libgsasl18                      2.2.2-2ubuntu1.1

Ubuntu 24.04 LTS
  gsasl                           2.2.1-1willsync1ubuntu0.1
  libgsasl18                      2.2.1-1willsync1ubuntu0.1

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

References:
  https://ubuntu.com/security/notices/USN-8356-1
  CVE-2026-48829

Package Information:
  https://launchpad.net/ubuntu/+source/gsasl/2.2.2-4ubuntu1.1
  https://launchpad.net/ubuntu/+source/gsasl/2.2.2-2ubuntu1.1
  https://launchpad.net/ubuntu/+source/gsasl/2.2.1-1willsync1ubuntu0.1
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