Vulnerability in Microsoft Windows Subsystem For Linux
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)
EPSS: 0.002 (11.9th percentile) — read the EPSS interpretation.
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
Weakness classification (CWE)
Public proof-of-concept exploits
References
- Windows Subsystem for Linux (WSL2) Kernel Tampering Vulnerability (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-57973?
- CVE-2026-57973 is a medium-severity vulnerability in Microsoft Windows Subsystem For Linux, 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.
- Is CVE-2026-57973 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.