CVE-2026-127101

medium

Description

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.

References

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-124601

https://bugzilla.redhat.com/show_bug.cgi?id=2572592

https://access.redhat.com/security/cve/CVE-2026-127101

Details

Source: Mitre, NVD

Published: 2026-11-12

Updated: 2026-11-12

Risk Information

CVSS v2

Base Score: 4.6

Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 5.5

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity: Medium