USN-8953-1: OpenVPN vulnerability

Publication date

22 October 2026

Overview

OpenVPN could allow unintended access to network services.


Packages

  • openvpn - virtual private network software

Details

It was discovered that OpenVPN incorrectly handled certificate subject
fields. A remote authenticated user could possibly use this issue to
impersonate other users.

It was discovered that OpenVPN incorrectly handled certificate subject
fields. A remote authenticated user could possibly use this issue to
impersonate other users.

Update instructions

After a standard system update you need to restart OpenVPN to make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
26.10 stonking openvpn –  2.7.7-1ubuntu1.1
26.04 LTS resolute openvpn –  2.7.0-1ubuntu1.4
24.04 LTS noble openvpn –  2.6.19-0ubuntu0.24.04.5
22.04 LTS jammy openvpn –  2.5.11-0ubuntu0.22.04.6

Reduce your security exposure

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Have additional questions?

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