Executive brief
Windows Secure Kernel Mode is a critical security component that isolates sensitive operations in Windows operating systems. A heap-based buffer overflow in this component allows an authorized local attacker to elevate their privileges to system level, potentially compromising the entire computer and any data or systems it can access.
Technical details
A heap-based buffer overflow vulnerability exists in Windows Secure Kernel Mode, a privileged isolation mechanism within the Windows kernel. The vulnerability allows an authorized local attacker with user-level privileges to trigger a buffer overflow condition, leading to memory corruption and code execution at kernel privilege level. Exploitation requires prior local system access and valid credentials, but no additional user interaction is needed. An attacker can leverage this flaw to fully compromise system security and gain complete control over the affected computer.
Affected products
- Microsoft Windows <UNKNOWN>
Timeline
- 2026-09-08: disclosed