CVE-2026-104044 Sssd: sssd: denial of service via crafted passkey kerberos authentication request
A local attacker can cause a denial of service in SSSD by triggering a null pointer dereference during passkey Kerberos authentication.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-104044?
CVE-2026-104044 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, published on 6 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-476
Which versions are affected by CVE-2026-104044?
How do I fix CVE-2026-104044?
No fix has been published for CVE-2026-104044 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-104044 being exploited?
There is no known exploitation of CVE-2026-104044 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-104044, GHSA-8mhg-g2wf-86gg, UBUNTU-CVE-2026-104044.