It was found that the fix for CVE-2018-10927, CVE-2018-10928, CVE-2018-10929, CVE-2018-10930, and CVE-2018-10926 was incomplete. A remote, authenticated attacker could use one of these flaws to execute arbitrary code, create arbitrary files, or cause denial of service on glusterfs server nodes via symlinks to relative paths.
https://security.gentoo.org/glsa/201904-06
https://lists.debian.org/debian-lts-announce/2018/11/msg00003.html
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14651