CVE-2026-90995

Name	CVE-2026-90995
Description	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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1148325

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
sssd (PTS)	bookworm	2.8.2-4+deb12u1	vulnerable
	trixie	2.10.1-2	vulnerable
	forky	2.13.1-4	vulnerable
	sid	2.13.1-5	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
sssd	source	(unstable)	2.13.1-5			1148325

Notes

[trixie] - sssd <no-dsa> (Minor issue)
https://bugzilla.redhat.com/show_bug.cgi?id=2479464
Fixed by: https://github.com/SSSD/sssd/commit/00b51c155a208eb90454d82b320069dfc74f631d (2.14.0-beta1)