What is CVE-2026-57973?

CVE-2026-57973 is a medium-severity vulnerability in Microsoft Windows Subsystem For Linux (Wsl2), classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 6.3/10. Published 2026-07-14.

How severe is CVE-2026-57973?

Medium severity. CVSS v3 base score is 6.3 out of 10.

Vulnerability in Microsoft Windows Subsystem For Linux (Wsl2)

CVE-2026-57973

Time-of-check time-of-use (toctou) race condition in Windows Subsystem for Linux allows an authorized attacker to perform tampering locally.

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N.

Affected products

Microsoft Windows Subsystem For Linux (Wsl2) — versions 5.0.0.0

Weakness classification (CWE)

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition

References

secure@microsoft.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-57973?: CVE-2026-57973 is a medium-severity vulnerability in Microsoft Windows Subsystem For Linux (Wsl2), classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 6.3/10. Published 2026-07-14.
How severe is CVE-2026-57973?: Medium severity. CVSS v3 base score is 6.3 out of 10.