USN-8892-1: Ubuntu Pro for WSL vulnerability

Publication date

6 October 2026

Overview

Ubuntu Pro for WSL could expose the Ubuntu Pro token to other users.


Packages

Details

Darshan U discovered that Ubuntu Pro for WSL exposed the attach token in
command-line arguments when enabling a subscription on a WSL instance.
An attacker could possibly use this issue to obtain sensitive information
and gain unauthorized access to Ubuntu Pro repositories.

Darshan U discovered that Ubuntu Pro for WSL exposed the attach token in
command-line arguments when enabling a subscription on a WSL instance.
An attacker could possibly use this issue to obtain sensitive information
and gain unauthorized access to Ubuntu Pro repositories.

Update instructions

In general, a standard system update will 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
26.04 LTS resolute wsl-pro-service –  0.1.19ubuntu2.1
24.04 LTS noble wsl-pro-service –  0.1.18~24.04.4
22.04 LTS jammy wsl-pro-service –  0.1.18~22.04.3
20.04 LTS focal wsl-pro-service –  0.1.18~20.04.2+esm1  

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.


Have additional questions?

Talk to a member of the team ›