CVE-2026-104044

Name	CVE-2026-104044
Description	A flaw was found in sssd. A local attacker can trigger a Denial of Service (DoS) by sending a specially crafted Pluggable Authentication Module (PAM) request when passkey authentication is enabled. Due to a missing state validation check in passkey Kerberos handling, the PAM responder dereferences an uninitialized pointer and crashes. This failure disrupts authentication services on the host.
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	1150238

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			1150238

Notes

[trixie] - sssd <no-dsa> (Minor issue)
https://bugzilla.redhat.com/show_bug.cgi?id=2478664
Fixed by: https://github.com/SSSD/sssd/commit/ed02f9d3559eb306d4a0a7bd4b117ade7aa9c48f (2.14.0-beta2)