Patched code sample

import ctypes
import os
import sys

_lib_name = "fido2.dll"

if sys.platform == "win32" and sys.version_info >= (3, 8):
    # Determine the path to the directory containing the bundled DLL.
    # In a real package, this path would point to where the DLL is installed.
    # For this example, we assume it's in a '_lib' subdirectory.
    dll_dir = os.path.join(os.path.dirname(os.path.abspath(__file__)), "_lib")

    # If the directory exists, add it to the DLL search path.
    # This ensures that Windows will look in this trusted location and not
    # in potentially unsafe locations like the current working directory.
    if os.path.isdir(dll_dir):
        try:
            os.add_dll_directory(dll_dir)
        except (FileNotFoundError, AttributeError):
            # Fallback for edge cases or if the function is unavailable.
            pass

# The vulnerable approach would have just called LoadLibrary directly,
# without the preceding steps to configure a safe search path on Windows.
try:
    # This will now use the secure search path on supported systems.
    lib_fido2 = ctypes.cdll.LoadLibrary(_lib_name)
except OSError:
    lib_fido2 = None