CVE-2025-29906 Finit bundled getty can bypass /bin/login
Finit's bundled getty allows unauthenticated login as any user, enabling privilege escalation and account takeover on affected Linux systems.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-29906?
CVE-2025-29906 is a high-severity authentication bypass vulnerability in troglobit finit, published on 29 Apr 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Finit is a fast init for Linux systems. Versions starting from 3.0-rc1 and prior to version 4.11 bundle an implementation of getty for the `tty` configuration directive that can bypass `/bin/login`, i.e., a user can log in as any user without authentication. This issue has been patched in version 4.11.
Weakness: CWE-287
Which versions are affected by CVE-2025-29906?
How do I fix CVE-2025-29906?
Upgrade to a fixed version.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2025-29906 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-29906 exists.
Sources
Also known as DEBIAN-CVE-2025-29906, GHSA-563g-p98j-mc9q, UBUNTU-CVE-2025-29906.