Hvci Bypass [better] Jun 2026

: The hypervisor uses Second Level Address Translation (SLAT) and Extended Page Tables (EPT) to mark kernel memory pages as Read-Execute (R-X) or Read-Write (R-W) .

Hypervisor-Protected Code Integrity (HVCI), commonly known as Memory Integrity in the Windows Security interface, is a cornerstone of modern Windows virtualization-based security (VBS). By utilizing the Windows hypervisor, HVCI creates an isolated, highly secure environment that enforces strict code integrity policies. It ensures that only signed, trusted code can be executed in the kernel, effectively neutralizing traditional kernel-mode malware and rootkits.

HVCI configures the Extended Page Tables (EPT) or Second Level Address Translation (SLAT) to strictly enforce Write Object or Execute (

If Lodestone could do this, every system claiming HVCI protection was vulnerable. Secure Enclaves? Bypassed. Credential Guard? A joke. The entire Windows security model, rebuilt around virtualization, was standing on a trapdoor. Hvci Bypass

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The "Secure Kernel" (which manages HVCI) now runs in VTL1, completely separate from the normal kernel. This defeats any "disable HVCI from within the normal kernel" attack unless the attacker has a VTL0 → VTL1 exploit (a far rarer and more difficult bug class).

Many users seek an "HVCI bypass" because the feature causes performance drops in gaming or prevents anti-cheat software like Riot Vanguard : The hypervisor uses Second Level Address Translation

Where the standard user-mode applications and the Windows kernel ( ntoskrnl.exe ) reside.

Zenbleed (CVE-2023-20593) on AMD CPUs could corrupt register state across trust boundaries, potentially affecting hypervisor state. In theory, a well-crafted speculative execution attack could flip the HVCI-enable bit in a hypervisor register without ever making a direct system call.

+-------------------------------------------------------------+ | Normal World (VTL 0) | | User Mode Apps <--------> Kernel Mode Drivers (W^X) | +-------------------------------------------------------------+ | Memory Page Allocation / Execution Request | v +-------------------------------------------------------------+ | Secure World (VTL 1) | | Hypervisor (Hyper-V) <---> Code Integrity Module (ci.dll) | | Enforces Second-Level Address Translation (SLAT) | +-------------------------------------------------------------+ 1. Virtual Trust Levels (VTL) It ensures that only signed, trusted code can

: Projects like LOLDrivers track drivers that can be used for these purposes. 3. Arbitrary Kernel Call Wrappers

The Netfilter and MalwareFox BYOVD incidents used this to install callbacks into CmpCallbackList (registry callbacks) without ever violating HVCI’s code integrity checks.

An "HVCI bypass" does not typically imply breaking the hypervisor's underlying cryptography. Instead, it involves finding architectural logical gaps, exploiting trusted software, or manipulating execution flows to run unauthorized logic within kernel space.