CVE-2026-90995 MEDIUM

CVE-2026-90995: Sssd: sssd: local denial of service due to null pointer dereference in pam responder

Vendor Red Hat
Product Red Hat Enterprise Linux 10
Weakness CWE-476
Published September 14, 2026
Last update September 14, 2026
View on NVD All CVEs

CVSS base score

5.5/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

September 14, 2026 CVE published