CVE-2026-68743: Fedoraproject Sssd

High severity, CVSS 7.1. EPSS: 0.1% chance of exploitation in the next 30 days.

A flaw was found in SSSD. The extract_authtok_v1() function in the PAM responder does not validate the auth_token_length field against the remaining buffer size before processing. A local attacker can exploit this via a crafted protocol v1 request to the PAM responder socket, causing an out-of-bounds read and process crash, resulting in a denial of service.

Affected products

• Fedoraproject Sssd: affected versions not specified
• Red Hat Enterprise Linux: version 7.0 only; version 8.0 only; version 9.0 only; version 10.0 only
• Red Hat Openshift Container Platform: version 4.0 only

Published 2026-08-04. Last modified 2026-08-31.