https://blog.wongcw.com/2021/07/17/%e5%be%ae%e8%bb%9f%e6%89%bf%e8%aa%8d%e5%ad%98%e5%9c%a8%e6%96%b0%e5%9e%8bprint-spool-lpe%e6%94%bb%e6%93%8a%ef%bc%88cve-2021-34481%ef%bc%89/