Hypervisor-Protected Code Integrity (HVCI) Security Feature Bypass Vulnerability. A hypervisor-protected code integrity (HVCI) security feature bypass vulnerability could exist when Windows incorrectly allows certain kernel-mode pages to be marked as Read, Write, Execute (RWX) even with HVCI enabled. To exploit this vulnerability an attacker could run a specially crafted script at administrator level that exploits a signed driver to bypass code integrity protections in Windows.