CVE-2026-109969 Clevis: clevis: no authentication on pkcs#11 af_unix sockets allows key injection under permissive umask
Local attackers can inject keys or steal LUKS passphrases via unsecured AF_UNIX sockets in Clevis when permissive umask settings are used.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-109969?
CVE-2026-109969 is a medium-severity missing authorization vulnerability in Red Hat Enterprise Linux 10, published on 14 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 the clevis PKCS#11 pin. The clevis-pkcs11-afunix-socket-unlock daemon creates AF_UNIX sockets without explicit permission restrictions or peer credential verification. Under a permissive process umask, any local user can connect to the control socket and inject arbitrary device/key pairs, or connect to the data socket to receive LUKS passphrases.
Weakness: CWE-306
Which versions are affected by CVE-2026-109969?
How do I fix CVE-2026-109969?
Apply the vendor's patch.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-109969 being exploited?
There is no known exploitation of CVE-2026-109969 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-109969, GHSA-w2m6-gjp4-v6hh, UBUNTU-CVE-2026-109969.