CVE-2026-85879
highTime-of-check time-of-use (toctou) race condition in Windows Subsystem for Linux allows an authorized attacker to elevate privileges locally.
Vendor / product: Microsoft — windows subsystem for linux
Time-of-check time-of-use (toctou) race condition in Windows Subsystem for Linux allows an authorized attacker to elevate privileges locally.
CVSS
7.0
7.0 (CVSS v3.1)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (secure@microsoft.com)
Timeline (UTC)
Published: 2026-10-13 19:21
Modified: 2026-10-29 15:03
NVD status: Analyzed
Last synced 5 days ago
Verified against the source API 2026-10-30 08:34 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
microsoft / windows_subsystem_for_linux ≥2.0.0 <2.7.10
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85879
Patch / mitigation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85879
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85879 secure@microsoft.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-30 08:34 UTC · record ↗