CVE-2022-40732: windows 11 21h2 Null Dereference

Description

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.

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CVSS v3.1 Score

5.0

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-476 CWE-476

Affected Products

Vendor	Product	Versions
microsoft	windows_11_21h2	All
microsoft	windows_server_2022	All

References

Exploits

https://talosintelligence.com/vulnerability_reports/TALOS-2022-1514

Frequently Asked Questions

What is CVE-2022-40732? +

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. It has a CVSS v3.1 base score of 5.0 (MEDIUM).

How severe is CVE-2022-40732? +

CVE-2022-40732 has a CVSS v3.1 score of 5.0 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2022-40732? +

CVE-2022-40732 affects products from microsoft, specifically: windows_11_21h2, windows_server_2022. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2022-40732? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2022-40732