CVE-2026-127101

CVSS 5.5 (medium) · published 2026-11-12

A flaw was found in SSSD's PAM responder. A local attacker can send an authentication request without first negotiating the client protocol version. The responder dereferences a NULL protocol-version pointer and crashes, disrupting SSSD-backed authentication. Repeated crafted requests can sustain the denial of service.

Weakness: CWE-476

Source: NVD CVE-2026-127101

References

• https://access.redhat.com/security/cve/CVE-2026-127101
• https://bugzilla.redhat.com/show_bug.cgi?id=2572592

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