The following code is for security research and authorized testing only.
python
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
// Simulated vulnerable object in communication module
typedef struct {
int id;
char payload[64];
} CommBuffer;
// Vulnerable function simulation
void vulnerable_comm_function() {
CommBuffer *buffer = (CommBuffer *)malloc(sizeof(CommBuffer));
if (buffer) {
buffer->id = 1;
strcpy(buffer->payload, "Critical Data");
// Memory is freed but pointer is not set to NULL
free(buffer);
// In a real scenario, 'buffer' might still be referenced in a callback or another thread
}
// Use-after-free trigger
if (buffer) {
printf("Data: %s\n", buffer->payload); // Accessing freed memory
}
}
int main() {
// Note: Exploitation requires High Privileges (PR:H) locally (AV:L)
printf("CVE-2026-34857 PoC Simulation\n");
vulnerable_comm_function();
return 0;
}