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.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

Mitigation 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.

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


Projects

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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

Status : Awaiting Analysis

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

Modified: 2026-08-06T15:37:22.093

Link: CVE-2026-68743

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

Weaknesses