Time-of-check Time-of-use (TOCTOU) Race Condition in Windows Subsystem for Linux (WSL2) - CVE-2026-57973
Published: July 15, 2026
Vulnerability identifier: #VU137770
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-57973
CWE-ID: CWE-367
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Windows Subsystem for Linux (WSL2)
Windows Subsystem for Linux (WSL2)
Detailed vulnerability description
The vulnerability allows a local user to compromise the target system.
The vulnerability exists due to a time-of-check, time-of-use (TOCTOU) race condition in Windows Subsystem for Linux (WSL2) Kernel. A local user can perform tampering attack on the system.
How to mitigate CVE-2026-57973
Install updates from vendor's website.