Vgk Driver File

The Vgk Driver (often listed as vgk.sys) is a kernel-mode driver developed by Riot Games. It is the core component of Riot Vanguard, the anti-cheat software used primarily for Valorant and League of Legends.

Unlike traditional anti-cheat systems that run only when the game is active, the Vgk Driver operates at the highest privilege level of Windows (Ring 0). This means it loads during system startup, before most other software, allowing it to monitor all processes, memory, and drivers for tampering or cheat software. Vgk Driver

Kernel-mode drivers operate at the highest privilege level (Ring 0 on x86/x64), granting direct hardware access and system memory manipulation. The designation "VGK Driver" has emerged in two distinct contexts: The Vgk Driver (often listed as vgk

This paper dissects both roles, emphasizing that while drivers are essential for performance, they introduce severe security risks if not properly constrained. This paper dissects both roles, emphasizing that while

// Simplified skeleton
static long vgk_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 
    switch(cmd) 
        case VGK_ALLOC_GPU_MEM:
            return vgk_alloc_mem(arg);
        case VGK_SUBMIT_CMD:
            return vgk_submit_cmd(arg);
        default:
            return -ENOTTY;
static struct file_operations vgk_fops = 
.unlocked_ioctl = vgk_ioctl,
;