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[USN-8356-1] GNU SASL vulnerability

Posted on 01 June 2026
Ubuntu Security

==========================================================================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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