Windows 11 23h2
CVE-2026-20836
HIGH
Severity by source
AV:L/AC:H/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
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Concurrent execution using shared resource with improper synchronization ('race condition') in Graphics Kernel allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation in the Graphics Kernel on Windows 11 and Linux systems results from improper synchronization of concurrent access to shared resources, allowing authenticated local attackers to gain elevated privileges. The vulnerability requires specific timing conditions to exploit but impacts multiple Windows versions and Linux distributions. No patch is currently available for this race condition vulnerability.
Technical ContextAI
Classified as CWE-362 (Race Condition). Affects Windows 10 1607. Concurrent execution using shared resource with improper synchronization ('race condition') in Graphics Kernel allows an authorized attacker to elevate privileges locally.
RemediationAI
Monitor vendor advisories for a patch.
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Same weakness CWE-362 – Race Condition
View allSame technique Race Condition
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External POC / Exploit Code
Leaving vuln.today