CVE-2025-50054: ovpn-dco-win Heap Overflow — Fix

Description

Buffer overflow in OpenVPN ovpn-dco-win version 1.3.0 and earlier and version 2.5.8 and earlier allows a local user process to send a too large control message buffer to the kernel driver resulting in a system crash

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-122 CWE-122

CWE-787 Out-of-bounds Write

Affected Products

Vendor	Product	Versions
openvpn	ovpn-dco-win	< 1.3.0
openvpn	ovpn-dco-win	2.4.0 — 2.5.8

References

Advisories & Patches

https://community.openvpn.net/Security%20Announcements/CVE-2025-50054

Other References

https://community.openvpn.net/Downloads#openvpn-27_alpha2-released-19-june-2025

Frequently Asked Questions

What is CVE-2025-50054? +

Buffer overflow in OpenVPN ovpn-dco-win version 1.3.0 and earlier and version 2.5.8 and earlier allows a local user process to send a too large control message buffer to the kernel driver resulting in a system crash It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-50054? +

CVE-2025-50054 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-50054? +

CVE-2025-50054 affects products from openvpn, specifically: ovpn-dco-win. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-50054? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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