Provide references for CVE-2018-6553.
Where can I find more information about CVE-2018-6553?
References are available at: https://usn.ubuntu.com/usn/usn-3713-1, https://www.debian.org/security/2018/dsa-4243, https://lists.debian.org/debian-lts-announce/2018/07/msg00014.html, https://security.gentoo.org/glsa/201908-08.