EUVD-2026-29604
GHSA-j2x4-j6jv-hpjv
CVSS 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 Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
AnalysisAI
Race condition in Windows Ancillary Function Driver for WinSock (AFD.sys) enables local privilege escalation for low-privileged authenticated users across Windows 10 (1607-22H2), Windows 11 (22H3-26H1), and Windows Server 2016. Microsoft confirmed the vulnerability and released patches via their March 2026 security updates. …
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RemediationAI
Within 24 hours: Inventory all Windows 10 (versions 1607-22H2), Windows 11 (versions 22H3-26H1), and Windows Server 2016 systems. Within 7 days: Apply Microsoft March 2026 security updates (or latest cumulative update containing AFD.sys patch) to all identified systems, prioritizing servers and systems with local access risk. …
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