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.
Affected products
fedoraproject: sssd; redhat: openshift container platform; redhat: enterprise linux
References2
- access.redhat.com/security/cve/CVE-2026-68743 Vendor Advisory
- bugzilla.redhat.com/show_bug.cgi?id=2509760 Issue TrackingVendor Advisory
Metrics
- CVSS 3.1
-
7.1
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H - EPSS — exploit probability
- 0% percentile: 3 · as of 13 November 2026
- CWE
- CWE-125
Could this be exploited in your environment?
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