Hackers exploited the issue to spread an extremely stealthy rootkit

WTF?

For six months, Microsoft was aware of a zero-day security vulnerability actively exploited by hackers.

The bug, tracked by Microsoft asCVE-2024-21338, is a Windows kernel elevation of privilege vulnerability.

Microsoft left a kernel-level, zero-day bug in Windows for six months before patching it

In theory, malicious users with administrative access could exploit the vulnerability to easily interact with the OS kernel.

The CVE-2024-21338 flaw, however, resides in Windows' native AppLocker service driver (appid.sys).

), and more.

Security experts now holdconflicting stanceson Redmond’s behavior with CVE-2024-21338.