Executive brief
A security vulnerability exists in the Windows Kernel, the core component of the Microsoft Windows operating system. An attacker who already has basic access to a computer could exploit this flaw to gain full administrative control over the system. This could allow them to access sensitive data, install malicious software, or disrupt business operations.
Technical details
This vulnerability is a race condition (CWE-362) in the Windows Kernel that can lead to a use-after-free (CWE-416) scenario. An attacker with low-privileged local access can exploit improper synchronization of shared resources during concurrent execution. Successful exploitation allows the attacker to elevate privileges, potentially escaping sandboxes or gaining SYSTEM-level access. The attack requires the attacker to win a timing window (High Attack Complexity) but does not require user interaction. Microsoft has released security updates to address this issue across affected versions of Windows 11 and Windows Server 2025.
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