CVE-2026-105390 Race condition in ovpn-dco-win
Local attackers can cause a system deadlock and unresponsiveness in the OpenVPN Windows driver via improper synchronization.
- 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-2026-105390?
CVE-2026-105390 is a medium-severity vulnerability in OpenVPN ovpn-dco-win, published on 13 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Improper synchronization in the OpenVPN ovpn-dco-win for Windows versions 0.6.5 through 1.3.5 and 2.4.0 through 2.8.7 allows local attackers to trigger a deadlock via a crafted write to the ovpn-dco device, causing the host to become unresponsive.
Which versions are affected by CVE-2026-105390?
How do I fix CVE-2026-105390?
No fix has been published for CVE-2026-105390 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-105390 being exploited?
There is no known exploitation of CVE-2026-105390 in the wild and no public exploit code.
Sources
Also known as GHSA-gwf4-3mjv-q2c9.