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

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:

Updated: 2026-08-04T19:10:51.243Z

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

Link: CVE-2026-68743

cve-icon Vulnrichment

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

cve-icon NVD

No data.

cve-icon Redhat

Severity : Moderate

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

Links: CVE-2026-68743 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-04T09:15:03Z