It enforces a strict "Write XOR Execute" policy. A memory page can be writable (to load data) or executable (to run code), but never both at the same time.
Bypassing HVCI is significantly more difficult than bypassing standard PatchGuard (KPP). It usually requires a combination of hardware vulnerabilities or complex logical flaws. 1. Exploiting Vulnerable Signed Drivers (BYOVD) Hvci Bypass
This article summarizes how HVCI works at a high level, the categories of bypass approaches researchers have explored, key real‑world research findings, practical implications, and defensive guidance. It enforces a strict "Write XOR Execute" policy