CVE-2026-109970 Clevis: clevis: pkcs#11 token pin written to world-readable file
Clevis writes PKCS#11 token PINs to world-readable files, allowing local attackers to read sensitive credentials and potentially decrypt disks.
- 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-2026-109970?
CVE-2026-109970 is a medium-severity 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-luks-pkcs11-askpin script writes the PKCS#11 token PIN in plaintext to a file without setting restrictive permissions. Under the default process umask, the file is world-readable. Additionally, the PIN file is not reliably cleaned up if the decryption script exits early, leaving the PIN accessible indefinitely.
Weakness: CWE-538
Which versions are affected by CVE-2026-109970?
How do I fix CVE-2026-109970?
Apply the vendor's patch.
Is CVE-2026-109970 being exploited?
There is no known exploitation of CVE-2026-109970 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-109970, GHSA-px84-jf5m-hcjv, UBUNTU-CVE-2026-109970.