---
id: CVE-2026-105390
title: >-
  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 unr…
summary: >-
  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 unr…
severity: none
cwe:
  - CWE-413
  - CWE-833
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T23:17:26.470'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-105390'
references:
  - url: 'https://community.openvpn.net/Security%20Announcements/CVE-2026-105390'
    label: security@openvpn.net
tags:
  - nvd
ingestedAt: '2026-10-14T00:07:19.218Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.