static inline int netlink_capable(const struct socket *sock, unsigned int flag)
{
	return (nl_table[sock->sk->sk_protocol].flags & flag) ||
		ns_capable(sock_net(sock->sk)->user_ns, CAP_NET_ADMIN);
}

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.