Executive brief
A security vulnerability has been identified in the Windows Kernel, the core component of the Microsoft Windows operating system. This flaw allows a user who already has basic access to a computer to gain full administrative control over the system. If exploited, an attacker could bypass security restrictions to access sensitive data, install malicious software, or disrupt business operations.
Technical details
This vulnerability is classified as a Use-After-Free (CWE-416) within the Windows Kernel. An attacker with local access and low-level privileges can exploit this flaw by triggering a condition where the kernel continues to use a memory pointer after it has been freed. Successful exploitation allows the attacker to execute code in kernel mode, leading to a full privilege escalation and a scope break (S:C). The vulnerability affects multiple versions of Windows 11 and Windows Server 2025. Microsoft has released security updates to address this issue.
Affected products
- Microsoft Windows 11 Version 24H2 10.0.26100.0 to 10.0.26100.8875
- Microsoft Windows 11 Version 25H2 10.0.26200.0 to 10.0.26200.8875
- Microsoft Windows 11 version 26H1 10.0.28000.0 to 10.0.28000.2269
- Microsoft Windows Server 2025 10.0.26100.0 to 10.0.26100.33158
Timeline
- 2026-07-14: disclosed
- 2026-07-14: advisory