Executive brief
A flaw in the Windows Kernel can allow an authorized user to escalate their privileges and gain higher-level access to a system. An attacker with local access to a Windows machine could exploit this vulnerability to run commands with system-level permissions, potentially compromising the entire machine and any data stored on it.
Technical details
This vulnerability is a numeric truncation error in the Windows Kernel that allows an authorized local attacker to escalate privileges. The flaw requires that an attacker already has valid local access to the system. By exploiting the truncation error in kernel code, the attacker can manipulate numeric values in a way that bypasses privilege checks and execute code with elevated (kernel-level) privileges. A patch from Microsoft should be available through standard Windows Update channels.
Affected products
- Microsoft Windows Kernel <UNKNOWN>
Timeline
- 2026-09-08: disclosed