CVE-2026-82325
Received Received - Intake

Use-After-Free in OpenVPN ovpn-dco-win Driver

Publication date: 2026-09-07

Last updated on: 2026-09-07

Assigner: OpenVPN Inc.

Description
A use-after-free vulnerability in the OpenVPN ovpn-dco-win driver version 2.5.0 through 2.8.6 allows local authenticated users to cause a system crash via crafted control messages

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Meta Information

Published
2026-09-07
Last Modified
2026-09-07
Generated
2026-09-07
AI Q&A
2026-09-07
EPSS Evaluated
N/A
NVD
CVE-2026-82325
EUVD
EUVD-2026-72348

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
openvpn ovpn-dco-win From 2.5.0 (inc) to 2.8.6 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-415 The product calls free() twice on the same memory address.
CWE-416 The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

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Executive Summary

This vulnerability is a use-after-free flaw in the OpenVPN ovpn-dco-win driver versions 2.5.0 through 2.8.6. It allows local authenticated users to cause a system crash by sending crafted control messages.

Detection Guidance

This vulnerability is specific to the OpenVPN ovpn-dco-win driver versions 2.5.0 through 2.8.6. Detection involves checking the installed driver version on Windows systems running OpenVPN. Use the command 'driverquery | findstr ovpn-dco-win' in Command Prompt to list installed drivers and verify versions.

Impact Analysis

This vulnerability could allow an attacker with local access to crash the system, potentially leading to denial of service or unauthorized actions depending on the system configuration.

Compliance Impact

The vulnerability is a use-after-free issue in the OpenVPN ovpn-dco-win driver that could allow local authenticated users to cause a system crash via crafted control messages. This type of vulnerability may impact compliance with standards like GDPR or HIPAA by potentially exposing sensitive data or disrupting secure communications if exploited.

Mitigation Strategies

Immediately update the OpenVPN ovpn-dco-win driver to a version outside the affected range (2.5.0-2.8.6). Download the latest version from the official OpenVPN website and replace the vulnerable driver. Ensure no local authenticated users have unnecessary privileges that could exploit this flaw.

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