Executive brief
A security vulnerability exists in the core drivers of the Windows operating system. This flaw allows a user who already has basic access to a computer to gain full administrative control. If exploited, an attacker could bypass security restrictions to access sensitive data, install malicious software, or disrupt system operations.
Technical details
This vulnerability is classified as a Use-After-Free (CWE-416) within the Windows Kernel-Mode Drivers. The flaw occurs when the kernel continues to use a memory pointer after the memory it points to has been freed, leading to potential memory corruption. An attacker must have local access and valid login credentials (low privilege) to exploit this. Successful exploitation allows the attacker to execute code with SYSTEM privileges, though the attack complexity is rated as high, likely due to race conditions or specific timing requirements needed to trigger the memory corruption. 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: Initial publication of the CVE record.
- 2026-07-14: advisory: Microsoft released the security update guide.