channel_close_fd(int *fdp)
{
	int ret = 0, fd = *fdp;

	if (fd != -1) {
		ret = close(fd);
		*fdp = -1;
		if (fd == channel_max_fd)
			channel_max_fd = channel_find_maxfd();
	}
	return ret;
}

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