mm_session_close(Session *s)
{
	debug3("%s: session %d pid %ld", __func__, s->self, (long)s->pid);
	if (s->ttyfd != -1) {
		debug3("%s: tty %s ptyfd %d", __func__, s->tty, s->ptyfd);
		session_pty_cleanup2(s);
	}
	session_unused(s->self);
}

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