CVE-2022-40733: Microsoft Windows 11 21h2

Medium severity, CVSS 6.5. EPSS: 0.8% chance of exploitation in the next 30 days.

An access violation vulnerability exists in the DirectComposition functionality win32kbase.sys driver version 10.0.22000.593 as part of Windows 11 version 22000.593 and version 10.0.20348.643 as part of Windows Server 2022 version 20348.643. A specially-crafted set of syscalls can lead to a reboot. An unprivileged user can run specially-crafted code to trigger Denial Of Service.

Affected products

• Microsoft Windows 11 21h2: version 10.0.22000.593 only
• Microsoft Windows Server 2022: version 10.0.20348.643 only

Published 2024-12-18. Last modified 2026-06-17.