wsl-pro-service: Ubuntu Pro token exposed via process command-line arguments
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 ). 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//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.
CVE-2026-102371
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-102371
Ubuntu Pro for WSL
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/canonical/ubuntu-pro-for-wsl",
"vendor": "Canonical",
"product": "Ubuntu Pro for WSL",
"versions": [
{
"status": "affected",
"version": "0.1.1",
"lessThan": "0.1.19ubuntu2",
"versionType": "ubuntu-resolute"
},
{
"status": "affected",
"version": "0.1.1",
"lessThan": "0.1.18~24.04.3",
"versionType": "ubuntu-noble"
},
{
"status": "affected",
"version": "0.1.1",
"lessThan": "0.1.18~22.04.2",
"versionType": "ubuntu-jammy"
},
{
"status": "affected",
"version": "0.1.1",
"lessThan": "0.1.18~20.04.2",
"versionType": "ubuntu-focal"
}
],
"platforms": [
"Linux"
],
"packageName": "wsl-pro-service",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-102371
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #4478 · Revision 1
- Added to Heist Feed
- Publisher date