CVE-2026-85879: Microsoft Windows Subsystem For Linux WSL2

High severity, CVSS 7.0. EPSS: 0.2% chance of exploitation in the next 30 days.

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

Affected products

• Microsoft Windows Subsystem For Linux WSL2: from 5.0.0.0, before 2.7.10 (fixed in 2.7.10)

Published 2026-10-13. Last modified 2026-10-14.