Reverse-engineering Valorant’s Vanguard Guarded Regions: PML4 Cloning, CR3 Swaps, and the SwapContext Hook PoC (Walk-through of Xyrem’s Post)

Original text: “In-depth analysis on Valorant’s Guarded Regions” — Xyrem, reversing.info (2023). Code blocks and figures below are reproduced verbatim with attribution captions.

Executive Summary

Riot’s Vanguard anti-cheat keeps a slice of Valorant’s game state in memory that is, from any other process or unprivileged thread’s point of view, simply not mapped. Xyrem’s post walks…

https://core-jmp.org/2026/06/reverse-engineering-valorant-vanguard-guarded-regions-pml4-cr3-swap-context-hook/