CVE-2026-21231
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Race Condition in Windows Kernel Enables Local Privilege Escalation

Publication date: 2026-02-10

Last updated on: 2026-02-11

Assigner: Microsoft Corporation

Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Kernel allows an authorized attacker to elevate privileges locally.
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Meta Information
Published
2026-02-10
Last Modified
2026-02-11
Generated
2026-06-16
AI Q&A
2026-02-10
EPSS Evaluated
2026-06-15
NVD
CVE-2026-21231
EUVD
EUVD-2026-7312
Affected Vendors & Products
Showing 23 associated CPEs
Vendor Product Version / Range
microsoft windows_server_2012 r2
microsoft windows_server_2012 *
microsoft windows_10_1607 to 10.0.14393.8868 (exc)
microsoft windows_10_1607 to 10.0.14393.8868 (exc)
microsoft windows_10_1809 to 10.0.17763.8389 (exc)
microsoft windows_server_2016 to 10.0.14393.8868 (exc)
microsoft windows_server_2019 to 10.0.17763.8389 (exc)
microsoft windows_server_2022 to 10.0.20348.4711 (exc)
microsoft windows_server_2025 to 10.0.26100.32313 (exc)
microsoft windows_11_24h2 to 10.0.26100.7781 (exc)
microsoft windows_11_24h2 to 10.0.26100.7781 (exc)
microsoft windows_11_23h2 to 10.0.22631.6649 (exc)
microsoft windows_11_23h2 to 10.0.22631.6649 (exc)
microsoft windows_11_25h2 to 10.0.26200.7781 (exc)
microsoft windows_11_25h2 to 10.0.26200.7781 (exc)
microsoft windows_server_2022_23h2 to 10.0.25398.2149 (exc)
microsoft windows_10_22h2 to 10.0.19045.6937 (exc)
microsoft windows_10_22h2 to 10.0.19045.6937 (exc)
microsoft windows_10_22h2 to 10.0.19045.6937 (exc)
microsoft windows_10_21h2 to 10.0.19044.6937 (exc)
microsoft windows_10_21h2 to 10.0.19044.6937 (exc)
microsoft windows_10_21h2 to 10.0.19044.6937 (exc)
microsoft windows_10_1809 to 10.0.17763.8389 (exc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-362 The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
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Executive Summary

This vulnerability is a race condition in the Windows Kernel caused by concurrent execution using a shared resource without proper synchronization. It allows an authorized attacker to elevate their privileges locally on the affected system.

Impact Analysis

The vulnerability can allow an attacker who already has some level of access to the system to increase their privileges. This means the attacker could gain higher-level permissions, potentially leading to full control over the affected system.

Compliance Impact

I don't know

Detection Guidance

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Mitigation Strategies

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