Windows 11 23h2
CVE-2026-20920
HIGH
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from Vendor (microsoft) · only source for this CVE.
CVSS VectorVendor: microsoft
Lifecycle Timeline
2DescriptionCVE.org
Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.
AnalysisAI
Windows Win32K use-after-free vulnerability in ICOMP affects Windows 11 23h2 and Windows Server 2022 23h2, enabling authenticated local attackers to achieve privilege escalation with high impact on confidentiality, integrity, and availability. Currently no patch is available, and exploitation requires local access with user-level privileges.
Technical ContextAI
Classified as CWE-416 (Use After Free). Affects Windows 11 23H2. Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.
RemediationAI
Monitor vendor advisories for a patch.
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Same weakness CWE-416 – Use After Free
View allSame technique Denial Of Service
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External POC / Exploit Code
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