USN-8355-1: SSSD vulnerability

Publication date

1 June 2026

Overview

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


Packages

  • sssd - System Security Services Daemon

Details

It was discovered that SSSD did not properly handle raw bytes in the PAM
passkey responder. A local attacker could possibly use this issue to cause
the SSSD PAM responder to crash, resulting in a denial of service.

It was discovered that SSSD did not properly handle raw bytes in the PAM
passkey responder. A local attacker could possibly use this issue to cause
the SSSD PAM responder to crash, resulting in a denial of service.

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
26.04 LTS resolute sssd –  2.12.0-1ubuntu5.1
25.10 questing sssd –  2.10.1-2ubuntu5.2
24.04 LTS noble sssd –  2.9.4-1.1ubuntu6.5

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