๐Ÿ›ก๏ธ CVE-2026-20809
๐ŸŸ  CVSS 7.8 โ€” High โœ… No Known Exploit CWE-122 NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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

Details

Severity HIGH
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE CWE-122
Public Exploit โœ… No
Source NVD
Published 2026-01-13
Updated 2026-06-02
Modified 2026-01-14
Fix URL N/A

Affected Packages

Software From version Fixed in
windows-10-1607 โ€” 10.0.14393.8783
windows-10-1809 โ€” 10.0.17763.8276
windows-10-21h2 โ€” 10.0.19044.6809
windows-10-22h2 โ€” 10.0.19045.6809
windows-11-23h2 โ€” 10.0.22631.6491
windows-11-24h2 โ€” 10.0.26100.7623
windows-11-25h2 โ€” 10.0.26200.7623
windows-server-2012 โ€” โ€”
windows-server-2016 โ€” 10.0.14393.8783
windows-server-2019 โ€” 10.0.17763.8276
windows-server-2022 โ€” 10.0.20348.4648
windows-server-2022-23h2 โ€” 10.0.25398.2092
windows-server-2025 โ€” 10.0.26100.32230

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