CVE-2025-3908 Path traversal in OpenVPN 3 Linux
A local attacker can exploit symlink handling in the configuration tool to change ownership and permissions of arbitrary directories, leading to privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-3908?
CVE-2025-3908 is a medium-severity path traversal vulnerability in OpenVPN 3 Linux, published on 19 May 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The configuration initialization tool in OpenVPN 3 Linux v20 through v24 on Linux allows a local attacker to use symlinks pointing at an arbitrary directory which will change the ownership and permissions of that destination directory.
Weakness: CWE-59
Which versions are affected by CVE-2025-3908?
It affects 1 product.
Products include Openvpn Openvpn3linux.
How do I fix CVE-2025-3908?
Apply the vendor's patch.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2025-3908 being exploited?
There is no known exploitation of CVE-2025-3908 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2025-3908, GHSA-fp2g-4h6f-28h2, UBUNTU-CVE-2025-3908.