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.

CVSS 3.1

5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.1% chance of exploitation in the next 30 days; higher than 2% of CVEs (scores of 2026-10-25)

CWE

CWE-476

Published

2026-09-14

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

Affected

• fedoraproject:sssd
• redhat:enterprise_linux
• redhat:openshift_container_platform

References

• https://access.redhat.com/security/cve/CVE-2026-90995
• https://bugzilla.redhat.com/show_bug.cgi?id=2479464

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