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.
History

Mon, 17 Aug 2026 13:30:00 +0000

Type Values Removed Values Added
First Time appeared Fedoraproject
Fedoraproject sssd
Redhat openshift Container Platform
CPEs cpe:2.3:a:fedoraproject:sssd:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
Vendors & Products Fedoraproject
Fedoraproject sssd
Redhat openshift Container Platform

Tue, 04 Aug 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 04 Aug 2026 19:00:00 +0000

Type Values Removed Values Added
Title sssd: sssd: PAM responder out-of-bounds read via unchecked auth_token_length in protocol v1 Sssd: sssd: pam responder out-of-bounds read via unchecked auth_token_length in protocol v1
First Time appeared Redhat
Redhat enterprise Linux
Redhat openshift
CPEs cpe:/a:redhat:openshift:4
cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
Redhat openshift
References

Mon, 03 Aug 2026 13:45:00 +0000

Type Values Removed Values Added
First Time appeared Sssd
Sssd sssd
Vendors & Products Sssd
Sssd sssd

Mon, 03 Aug 2026 12:15:00 +0000

Type Values Removed Values Added
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.
Title sssd: sssd: PAM responder out-of-bounds read via unchecked auth_token_length in protocol v1
Weaknesses CWE-125
References
Metrics threat_severity

None

cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2026-08-04T18:37:21.159Z

Updated: 2026-08-31T18:11:43.013Z

Reserved: 2026-07-31T12:44:34.409Z

Link: CVE-2026-68743

cve-icon Vulnrichment

Updated: 2026-08-04T19:10:19.852Z

cve-icon NVD

Status : Analyzed

Published: 2026-08-04T19:16:53.467

Modified: 2026-08-31T19:17:10.300

Link: CVE-2026-68743

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-08-03T07:34:52Z

Links: CVE-2026-68743 - Bugzilla