static int do_ebt_set_ctl(struct sock *sk,
	int cmd, void __user *user, unsigned int len)
{
	int ret;

	if (!capable(CAP_NET_ADMIN))
		return -EPERM;

	switch(cmd) {
	case EBT_SO_SET_ENTRIES:
		ret = do_replace(sock_net(sk), user, len);
		break;
	case EBT_SO_SET_COUNTERS:
		ret = update_counters(sock_net(sk), user, len);
		break;
	default:
		ret = -EINVAL;
	}
	return ret;
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.