Windows CVE-2026-21237
HIGHCVSS VectorNVD
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionNVD
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Subsystem for Linux allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Windows Subsystem for Linux affects Windows 11 23h2 and Windows 10 22h2 through a race condition in shared resource synchronization. An authenticated local attacker can exploit this vulnerability to gain elevated privileges on the system. …
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RemediationAI
Within 24 hours: Identify all systems running WSL and assess user access levels; notify development and infrastructure teams of the vulnerability. Within 7 days: Implement compensating controls including disabling WSL where not business-critical, restricting WSL access to trusted users only, and enforcing principle of least privilege for existing WSL users. …
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