Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
Microsoft Windows Subsystem for Linux (WSL2) — Windows Subsystem for Linux (WSL2) Kernel Tampering Vulnerability
AV AC PR UI S C I A CVSS EPSS %ile KEV
L H L N U N H N 4.7 .0016 6.1 —
AFFECTED
Product Versions Fixed
Windows Subsystem for Linux (WSL2) 5.0.0.0 – —
TIMELINE
Jun 26 Reserved by microsoft
Jul 14 Published (CNA: microsoft)
Jul 20 RESCORED — CVE-2026-57973 (Microsoft Windows Subsystem for Linux (WSL2)). CVSS 6.3 → 4.7 (NVD).
Description
Time-of-check time-of-use (toctou) race condition in Windows Subsystem for Linux allows an authorized attacker to perform tampering locally.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| June 26, 2026 | Reserved | Reserved by microsoft |
| July 14, 2026 | Published | Published (CNA: microsoft) |
| July 20, 2026 | RESCORED | RESCORED — CVE-2026-57973 (Microsoft Windows Subsystem for Linux (WSL2)). CVSS 6.3 → 4.7 (NVD). |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Microsoft | Windows Subsystem for Linux (WSL2) | — | 5.0.0.0 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-57973 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.