CVE-2026-90995

A flaw was found in SSSD (System Security Services Daemon). A local attacker with privileges to connect to the PAM (Pluggable Authentication Modules) responder socket can send a specially crafted protocol request. If the `pam_app_services` configuration is enabled and the service item is omitted from the request, a NULL pointer dereference can occur. This vulnerability leads to a denial of service, causing the PAM responder to crash and disrupt authentication services.

• CWE-476

• https://access.redhat.com/security/cve/CVE-2026-90995Mitigation, Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2479464Exploit, Issue Tracking, Mitigation, Vendor Advisory

Published

Sep 14, 2026

Last Modified

Oct 14, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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