Vulnerability · Published Jul 14, 2026 · Assigned by microsoft
CVE-2026-57973Windows Subsystem for Linux (WSL2) Kernel Tampering Vulnerability
Medium 6.3
In plain English
A medium-severity security flaw in Windows Subsystem for Linux (WSL2) from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Severity (CVSS 3.1)6.3Medium
Exploit odds (30 days)0.2%top 87.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC
Official description
Time-of-check time-of-use (toctou) race condition in Windows Subsystem for Linux allows an authorized attacker to perform tampering locally.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows Subsystem for Linux (WSL2) | 5.0.0.0 – before 2.7.10 |
Weakness: CWE-367 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C
References
- Windows Subsystem for Linux (WSL2) Kernel Tampering Vulnerability vendor-advisory, patch