Advisory Details

March 10th, 2026

Microsoft Windows win32full Improper Release Local Privilege Escalation Vulnerability

ZDI-26-183
ZDI-CAN-28498

CVE ID CVE-2026-24285
CVSS SCORE 7.8, AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Windows
VULNERABILITY DETAILS

This vulnerability allows local attackers to escalate privileges 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 improper management of a reference count. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of 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-2026-24285
DISCLOSURE TIMELINE
  • 2025-12-02 - Vulnerability reported to vendor
  • 2026-03-10 - Coordinated public release of advisory
  • 2026-03-10 - Advisory Updated
CREDIT Marcin Wiazowski
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