CVE-2026-102371
Publication date 29 September 2026
Last updated 6 October 2026
Ubuntu priority
Description
In wsl-pro-service before 0.1.19ubuntu3, the service component which runs as root inside each WSL instance attaches the instance to Ubuntu Pro by executing the pro client with the Ubuntu Pro token passed as a command-line argument (pro attach <token>). On systems where /proc is mounted without process-hiding mitigations (such as hidepid), which is the default in WSL, an unprivileged local user or process in the same WSL instance can read the token from /proc/<pid>/cmdline while the attach process is running. The leaked token could then be used to attach other machines to the victim's Ubuntu Pro subscription and gain unauthorized access to Ubuntu Pro services.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| wsl-pro-service | 26.04 LTS resolute |
Fixed 0.1.19ubuntu2.1
|
| 24.04 LTS noble |
Fixed 0.1.18~24.04.4
|
|
| 22.04 LTS jammy |
Fixed 0.1.18~22.04.3
|
|
| 20.04 LTS focal |
Fixed 0.1.18~20.04.2+esm1
|
Get expanded security coverage with Ubuntu Pro
Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.
Get Ubuntu Pro 30-day free trialSeverity score breakdown
CVSS version: CVSS v4.0
Base score
5.7 · Medium
Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
References
Related Ubuntu Security Notices (USN)
- USN-8892-1
- Ubuntu Pro for WSL vulnerability
- 6 October 2026