static int br_mdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
{
	struct net_device *dev;
	struct br_mdb_entry *entry;
	struct net_bridge *br;
	int err;

	err = br_mdb_parse(skb, nlh, &dev, &entry);
	if (err < 0)
		return err;

	br = netdev_priv(dev);

	err = __br_mdb_del(br, entry);
	if (!err)
		__br_mdb_notify(dev, entry, RTM_DELMDB);
	return err;
}

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.