Executive brief
Windows Win32K is a core system component that manages graphics, input, and window operations on Microsoft Windows. A use-after-free memory vulnerability in this component allows an authorized local attacker to elevate their privileges to system level, potentially gaining complete control of the affected device and bypassing security restrictions.
Technical details
A use-after-free vulnerability exists in the Windows Win32K kernel component, which can be triggered by an authorized local attacker to elevate privileges. The vulnerability allows an attacker with valid user credentials to access memory that has been freed, leading to arbitrary code execution in kernel mode and privilege escalation. This vulnerability requires local access and existing user-level permissions on the system to exploit. Microsoft has issued security updates to remediate this flaw.
Affected products
- Microsoft Windows <UNKNOWN>
Timeline
- 2026-09-08: disclosed