static int multicast_init(void)
{
	int sd;
	struct sockaddr sa;
	struct sockaddr_in *sin = (struct sockaddr_in *)&sa;

	sd = socket(AF_INET, SOCK_DGRAM | SOCK_NONBLOCK | SOCK_CLOEXEC, 0);
	if (sd < 0) {
		logit(LOG_ERR, "Failed opening multicast socket: %s", strerror(errno));
		return -1;
	}

	memset(&sa, 0, sizeof(sa));
	sin->sin_family = AF_INET;
	sin->sin_addr.s_addr = inet_addr(MC_SSDP_GROUP);
	sin->sin_port = htons(MC_SSDP_PORT);

	if (bind(sd, &sa, sizeof(*sin)) < 0) {
		close(sd);
		logit(LOG_ERR, "Failed binding to %s:%d: %s", inet_ntoa(sin->sin_addr), MC_SSDP_PORT, strerror(errno));
		return -1;
	}

	register_socket(sd, -1, &sa, NULL, ssdp_recv);

	return sd;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.