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
A type confusion vulnerability (CWE-843) exists in the Windows Kernel due to the improper handling of resources using incompatible types. An attacker with local access and low privileges can exploit this flaw to execute code in kernel mode or otherwise elevate their privileges. The attack requires a local presence on the machine and is characterized by high complexity, though it does not require user interaction. Microsoft has released security updates to address this issue across various versions of Windows 10, Windows 11, and Windows Server.
Affected products
- Microsoft Windows 10 1607, 1809, 21H2, 22H2
- Microsoft Windows 11 24H2, 25H2, 26H1
- Microsoft Windows Server 2012 All versions
Timeline
- 2026-07-14: disclosed
- 2026-07-14: advisory