A flaw was found in SSSD's PAM responder on builds with the JSON PAM extension enabled. A local attacker can submit a crafted authentication request containing a non-string OAuth2 code value. Missing JSON type validation leads to a NULL pointer dereference, terminating the PAM responder and disrupting SSSD-backed authentication.

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History

Thu, 12 Nov 2026 18:00:00 +0000

Type Values Removed Values Added
Description A flaw was found in SSSD's PAM responder on builds with the JSON PAM extension enabled. A local attacker can submit a crafted authentication request containing a non-string OAuth2 code value. Missing JSON type validation leads to a NULL pointer dereference, terminating the PAM responder and disrupting SSSD-backed authentication.
Title Sssd: sssd: local denial of service through unchecked oauth2 json code type in pam responder
First Time appeared Redhat
Redhat enterprise Linux
Redhat openshift
Redhat rhel Els
Weaknesses CWE-476
CPEs cpe:/a:redhat:enterprise_linux:10
cpe:/a:redhat:enterprise_linux:8
cpe:/a:redhat:enterprise_linux:9
cpe:/a:redhat:openshift:4
cpe:/a:redhat:openshift:5
cpe:/o:redhat:rhel_els:6
cpe:/o:redhat:rhel_els:7
Vendors & Products Redhat
Redhat enterprise Linux
Redhat openshift
Redhat rhel Els
References
Metrics 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'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-11-12T17:55:00.351Z

Reserved: 2026-11-12T14:41:14.738Z

Link: CVE-2026-127100

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-11-12T18:17:40.677

Modified: 2026-11-12T18:17:41.030

Link: CVE-2026-127100

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

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Weaknesses