CVE-2026-105390

Medium

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.

SeverityMedium

CVSS6.9

Exploit probability—

ProductOpenvpn Ovpn-dco-win

PublishedOct 13, 2026

First seenOct 13, 2026

Weakness typeCWE-413CWE-413 CWE-833CWE-833

How to fix

Vendor advisories

community.openvpn.net/Security%20Announcements/CVE-2026-105390

Affected products

Product	Affected versions	Fixed in
OpenVPN ovpn-dco-win	0.6.5 ≤ v ≤ 1.3.5, 2.4.0 ≤ v ≤ 2.8.7	—

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