Is CVE-2026-68743 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-68743?

CVE-2026-68743 has a CVSS v3 severity of MEDIUM (5.5).

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CVE-2026-68743

Description

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.