The following code is for security research and authorized testing only.
python
#include <windows.h>
#include <iostream>
// Proof of Concept for Integer Overflow in Windows DWM Core Library
// This is a simulation of the trigger logic.
void TriggerOverflow() {
// Simulate the vulnerable calculation
size_t count = 0x100000000; // Large value
size_t element_size = 0x10;
// Integer overflow occurs here if not checked properly
// 0x100000000 * 0x10 wraps to 0 in a 32-bit context or similar
size_t total_size = count * element_size;
if (total_size == 0) {
std::cout << "[+] Integer overflow triggered: Total size is 0." << std::endl;
// Attempt to allocate memory or call the vulnerable API
// In a real scenario, this would lead to a heap overflow or OOB write
// ExploitPayload();
} else {
std::cout << "[-] Overflow not triggered." << std::endl;
}
}
int main() {
std::cout << "[*] Starting PoC for CVE-2026-42896..." << std::endl;
TriggerOverflow();
return 0;
}