CVE-2026-105390: CWE-413 Improper resource locking in OpenVPN ovpn-dco-win
Description
CVE-2026-105390 is a medium severity vulnerability in OpenVPN's ovpn-dco-win component for Windows. It affects versions 0.6.5 through 1.3.5 and 2.4.0 through 2.8.7. The flaw is due to improper synchronization that can lead to a deadlock when a local attacker performs a crafted write to the ovpn-dco device. This deadlock causes the host system to become unresponsive.
CVSS v4.0
Score 6.9medium
Affected software
OpenVPN
ovpn-dco-win
pkg:github/openvpn/ovpn-dco-winRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves improper resource locking (CWE-413) in the ovpn-dco-win component of OpenVPN on Windows platforms. Versions from 0.6.5 up to and including 1.3.5, and from 2.4.0 up to and including 2.8.7, are affected. A local attacker can trigger a deadlock condition by issuing a specially crafted write operation to the ovpn-dco device, resulting in the host becoming unresponsive. The CVSS 4.0 base score is 6.9, reflecting a medium severity with local attack vector and high impact on availability.
Potential Impact
Successful exploitation causes a deadlock that renders the host system unresponsive, impacting availability. The attack requires local access and no privileges, user interaction, or network access are needed. There is no indication of confidentiality or integrity impact.
Mitigation Recommendations
No vendor advisory or patch information is provided. Patch status is not yet confirmed — check the OpenVPN vendor advisory for current remediation guidance. Until a fix is available, restrict local access to trusted users to mitigate risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- OpenVPN
- Date Reserved
- 2026-10-05T10:34:02.496Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aceb8ec2cdf04f656c7c114
Added to database: 10/13/2026, 23:04:12 UTC
Last enriched: 10/13/2026, 23:18:45 UTC
Last updated: 10/13/2026, 23:18:45 UTC
Views: 6
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.