{"id":"CVE-2026-68743","title":"Sssd: sssd: pam responder out-of-bounds read via unchecked auth_token_length in protocol v1","summary":"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 …","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-125"],"vendor":"Red Hat","product":"sssd","affected":["sssd (all versions)","sssd","sssd (all versions)","sssd (all versions)","sssd (all versions)","openshift/ose-rhel-coreos-8 (all versions)","openshift/ose-rhel-coreos-9 (all versions)","openshift/ose-rhel-coreos-9 (all versions)"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-08-04T19:03:32.411357Z"},"published":"2026-08-04","updated":"2026-11-05","sourceUpdated":"2026-11-05T22:51:35.772Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-68743","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-68743"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2509760","label":"RHBZ#2509760"}],"tags":["cve.org"],"epss":0.00133,"epssPercentile":0.02887,"ingestedAt":"2026-11-05T23:41:31.938Z","slug":"CVE-2026-68743","body":"## Overview\n\nA 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.\n\n## Affected\n\n- `sssd (all versions)`\n- `sssd`\n- `sssd (all versions)`\n- `sssd (all versions)`\n- `sssd (all versions)`\n- `openshift/ose-rhel-coreos-8 (all versions)`\n- `openshift/ose-rhel-coreos-9 (all versions)`\n- `openshift/ose-rhel-coreos-9 (all versions)`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n### Workarounds\n\nMitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}