Microsoft Windows Kernel Privilege Escalation Vulnerability

A vulnerability allowing integer overflow in the Windows Kernel has been identified, which could enable an authorized attacker to elevate privileges locally. This vulnerability could be exploited by sending specially crafted input from a sandboxed user-mode process, triggering the overflow and resulting in a buffer overflow in the kernel. Such an exploit could lead to unauthorized access to SYSTEM privileges, allowing the attacker to escape from a contained execution environment.

Impact

Exploitation of this vulnerability could result in unauthorized privilege escalation, allowing an attacker to gain SYSTEM privileges.

Remediation

Users can apply the security update for this vulnerability, which is available as part of the September 2025 Patch Tuesday updates. Instructions for downloading this security update can be found in the Microsoft Update Catalog.