Description
OpenVPN ovpn-dco-win 0.6.5 through 2.8.13 allows unprivileged local users to cause a denial of service (system crash) via a race condition in the TCP connect path.
Published: 2026-10-28
Score: 5.7 Medium
EPSS: n/a
KEV: No
Impact: Denial of Service (system crash)
Action: Apply Patch
AI Analysis

Impact

A race condition in the TCP connect path of OpenVPN’s ovpn-dco-win component allows an unprivileged local user to trigger a system crash, thereby causing a denial of service. The flaw is identified as a race condition (CWE-362) and may involve improper handling of shared resources (CWE-672). The vulnerability provides no persistence or covert access, but it compromises system availability by forcing the entire service or potentially the host to terminate.

Affected Systems

The affected product is OpenVPN’s ovpn-dco-win, with vulnerable releases ranging from version 0.6.5 to 2.8.13. No other vendors or product variants are listed as affected.

Risk and Exploitability

The CVSS score of 5.7 indicates moderate severity, and the EPSS score is not available, implying limited public exploitation data. The vulnerability is not listed in CISA’s KEV catalog. Exploitability requires a local unprivileged account and occurs during normal client operations that trigger a race condition in the TCP connect logic. The attack vector is thus local and does not require network or remote code execution.

Generated by OpenCVE AI on October 28, 2026 at 16:51 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Upgrade OpenVPN to a release newer than 2.8.13, which contains the race–condition fix for the TCP connect path.
  • If an upgrade is not feasible immediately, restrict the execution of ovpn-dco-win to privileged accounts or remove the executable from the system path to prevent unprivileged use.
  • Monitor system logs for repeated crash events and apply any available interim vendor advisories or hot‑fixes as they become available.

Generated by OpenCVE AI on October 28, 2026 at 16:51 UTC.

Tracking

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Advisories

No advisories yet.

History

Wed, 28 Oct 2026 17:15:00 +0000

Type Values Removed Values Added
Title Race Condition in OpenVPN ovpn-dco-win TCP Connect Path Enables Local Denial of Service

Wed, 28 Oct 2026 16:45:00 +0000

Type Values Removed Values Added
First Time appeared Openvpn
Openvpn ovpn-dco-win
Vendors & Products Openvpn
Openvpn ovpn-dco-win

Wed, 28 Oct 2026 15:15:00 +0000

Type Values Removed Values Added
Description OpenVPN ovpn-dco-win 0.6.5 through 2.8.13 allows unprivileged local users to cause a denial of service (system crash) via a race condition in the TCP connect path.
Weaknesses CWE-362
CWE-672
References
Metrics cvssV4_0

{'score': 5.7, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Subscriptions

Openvpn Ovpn-dco-win
cve-icon MITRE

Status: PUBLISHED

Assigner: OpenVPN

Published:

Updated: 2026-10-28T15:00:23.951Z

Reserved: 2026-10-22T11:37:31.276Z

Link: CVE-2026-115402

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-28T15:17:04.277

Modified: 2026-10-28T15:24:42.667

Link: CVE-2026-115402

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-28T17:00:17Z

Weaknesses
  • CWE-362

    Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

  • CWE-672

    Operation on a Resource after Expiration or Release