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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Redhat_linux | — | No solution exists | Aug 6, 2026 | Aug 3, 2026 |
| Ubuntu | — | Upgrade sssd-common (Ubuntu Pro)Upgrade sssd-common | Sep 14, 2026 | Sep 3, 2026 |
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