CVE-2026-33840 Windows Win32K权限提升漏洞

/* * PoC for CVE-2026-33840 (Windows Win32k Use-After-Free) * This is a conceptual demonstration of triggering the UAF vulnerability. * Do not use for malicious purposes. */ #include <windows.h> #include <stdio.h> // Simulating the trigger for the ICOMP UAF void TriggerUAF() { HWND hWnd = CreateWindowExW(0, L"BUTTON", L"PoC", 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL); if (!hWnd) { printf("Failed to create window.\n"); return; } // Step 1: Trigger the object allocation in Win32k // (Specific API calls omitted for safety) // Step 2: Trigger the free operation via specific message sequence // SendMessage(hWnd, WM_XXX, ...); // Step 3: Attempt to use the freed object (Use-After-Free) // This causes the kernel to access invalid memory // SendMessage(hWnd, WM_YYY, ...); printf("Trigger sent. If vulnerable, system may crash or execute code.\n"); } int main() { printf("Starting PoC for CVE-2026-33840...\n"); TriggerUAF(); return 0; }