static struct sock *tcp_v4_cookie_check(struct sock *sk, struct sk_buff *skb)
{
#ifdef CONFIG_SYN_COOKIES
	const struct tcphdr *th = tcp_hdr(skb);

	if (!th->syn)
		sk = cookie_v4_check(sk, skb);
#endif
	return sk;
}

The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.