The Spectre and Meltdown class of vulnerabilities provided an indirect HVCI bypass.
A. BYOVD (Bring Your Own Vulnerable Driver) + Data-Only Attacks Hvci Bypass
The potential risks and consequences of HVCI Bypass are significant and far-reaching. Some of the most notable concerns include: The Spectre and Meltdown class of vulnerabilities provided
The rarest and most devastating form of bypass involves an actual exploit within the hypervisor layer (Hyper-V). If an attacker can find an instruction handling flaw or a memory corruption vulnerability within the virtualization layer itself, they can break out of VTL 0, compromise VTL 1, and completely disable HVCI enforcement at the root level. 3. Microsoft’s Defenses and Mitigations compromise VTL 1
To identify zero-day vulnerabilities and help Microsoft patch architectural weaknesses. Common HVCI Bypass Techniques