static int msgrecv(int sockfd, void *buf, size_t len)
{
	struct timeval tv;
	fd_set rfds;

	FD_ZERO(&rfds);
	FD_SET(sockfd, &rfds);
	tv.tv_sec = 2;
	tv.tv_usec = 0;

	if (select(sockfd+1, &rfds, NULL, NULL, &tv) <= 0)
		return -1;
	return recv(sockfd, buf, len, MSG_DONTWAIT);
}

This category addresses vulnerabilities caused by flawed access control mechanisms, where incorrect permission settings allow unauthorized users to access restricted resources.