Zero-day vulnerability in Windows

Buffer overflow

Vulnerability details

Advisory: SB2024021367 - Multiple vulnerabilities in Microsoft Windows Kernel

Vulnerable component: Windows

CVE-ID: CVE-2024-21338

CVSSv3 score: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-119 - Memory corruption


The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error within the appid.sys AppLocker driver. A local user can trigger memory corruption and execute arbitrary code with elevated privileges.

Note, the vulnerability is being actively exploited in the wild.