Exploit Development: No Code Execution? No Problem! Living The Age of VBS, HVCI, and Kernel CFG

# Executive Summary This detailed technical write-up explains Windows Virtualization-Based Security (VBS) and Hypervisor-Protected Code Integrity (HVCI) internals, then demonstrates a proof-of-concept exploitation technique that leverages an arbitrary kernel read/write primitive and a kernel-mode ROP chain to call arbitrary kernel APIs (enabling local privilege escalation) without executing unsigned shellcode; the PoC targets a vulnerable Dell driver (CVE-2021-21551) and includes full exploitation steps, code snippets, and mitigation guidance.