CVE-2026-34858 通信模块释放后使用漏洞

#include <stdio.h> #include <stdlib.h> #include <string.h> // Simulated vulnerable structure in the communication module typedef struct { int session_id; char *data_buffer; } CommSession; void trigger_vulnerability() { // Step 1: Allocate memory for the session CommSession *session = (CommSession *)malloc(sizeof(CommSession)); session->data_buffer = (char *)malloc(1024); session->session_id = 0xDEADBEEF; printf("[+] Session allocated. ID: 0x%x\n", session->session_id); // Step 2: Simulate module logic that frees the session // Vulnerability: The code frees the object but keeps a reference in a global list free(session->data_buffer); free(session); printf("[+] Session freed.\n"); // Step 3: Use-After-Free trigger // The module later attempts to use the freed session pointer if (session != NULL) { printf("[*] Attempting to write to freed memory...\n"); // This write corrupts memory, leading to a crash or potential execution flow control strcpy(session->data_buffer, "MALICIOUS_PAYLOAD"); } } int main() { trigger_vulnerability(); return 0; }