Advisory Details

April 24th, 2023

Microsoft Windows win32kfull Null Pointer Dereference Denial-of-Service Vulnerability

ZDI-23-475
ZDI-CAN-18078

CVE ID CVE-2022-44697
CVSS SCORE 6.5, AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Windows
VULNERABILITY DETAILS

This vulnerability allows local attackers to create a denial-of-service condition on affected installations of Microsoft Windows. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the win32kfull driver. The issue results from dereferencing a NULL pointer. An attacker can leverage this vulnerability to create a denial-of-service condition on the system.

ADDITIONAL DETAILS Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-44697
DISCLOSURE TIMELINE
  • 2022-08-19 - Vulnerability reported to vendor
  • 2023-04-24 - Coordinated public release of advisory
CREDIT Marcin Wiazowski
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