CVE-2026-105390
MediumCVSS 6.9Summary
Improper synchronization in 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.
Risk Assessment
An attacker with local access could cause a denial of service (DoS) by hanging the system, potentially disrupting critical services.
Recommendation
Update the ovpn-dco-win driver to a version newer than 2.8.7 or 1.3.5 to prevent deadlock occurrence.
Other vulnerabilities in OpenVPN ovpn-dco-win
See all- CVE-2026-82325Medium
A use-after-free vulnerability in the OpenVPN ovpn-dco-win driver versions 2.5.0 through 2.8.6 allows local authenticated users to cause a system crash via crafted control messages.
- CVE-2026-11604Medium
In OpenVPN ovpn-dco-win versions 2.0.0 through 2.8.3, an incorrect buffer size calculation in the epoch key generator allows a remote authenticated peer to trigger a heap-based buffer overflow and kernel memory corruption via a crafted data packet, causing a system crash.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS