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[USN-8892-1] Ubuntu Pro for WSL vulnerability

Posted on 07 October 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8892-1
October 06, 2026

wsl-pro-service vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

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

Software Description:
- wsl-pro-service: Ubuntu Pro for WSL service

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.

Update instructions:

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

Ubuntu 26.04 LTS
wsl-pro-service 0.1.19ubuntu2.1

Ubuntu 24.04 LTS
wsl-pro-service 0.1.18~24.04.4

Ubuntu 22.04 LTS
wsl-pro-service 0.1.18~22.04.3

Ubuntu 20.04 LTS
wsl-pro-service 0.1.18~20.04.2+esm1
Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-8892-1
CVE-2026-102371

Package Information:
https://launchpad.net/ubuntu/+source/wsl-pro-service/0.1.19ubuntu2.1
https://launchpad.net/ubuntu/+source/wsl-pro-service/0.1.18~24.04.4
https://launchpad.net/ubuntu/+source/wsl-pro-service/0.1.18~22.04.3

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