Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Kernel allows an authorized attacker to elevate privileges locally.
References (1)
Core 1
Core References
Vendor Advisory vendor-advisory
patch
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21231
Scores
CVSS v3
7.8
EPSS
0.0243
EPSS Percentile
82.1%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-362
Status
published
Products (36)
Microsoft/Windows 10 Version 1607
10.0.14393.0 - 10.0.14393.8868
Microsoft/Windows 10 Version 1809
10.0.17763.0 - 10.0.17763.8389
Microsoft/Windows 10 Version 21H2
10.0.19044.0 - 10.0.19044.6937
Microsoft/Windows 10 Version 22H2
10.0.19045.0 - 10.0.19045.6937
Microsoft/Windows 11 version 22H3
10.0.22631.0 - 10.0.22631.6649
Microsoft/Windows 11 Version 23H2
10.0.22631.0 - 10.0.22631.6649
Microsoft/Windows 11 Version 24H2
10.0.26100.0 - 10.0.26100.7840
Microsoft/Windows 11 Version 25H2
10.0.26200.0 - 10.0.26200.7840
Microsoft/Windows 11 version 26H1
10.0.28000.0 - 10.0.28000.1575
Microsoft/Windows 11 Version 26H1
10.0.28000.0 - 10.0.28000.1575
... and 26 more
Published
Feb 10, 2026
Tracked Since
Feb 18, 2026