It was found that in ghostscript some privileged operators remained accessible from various places after the CVE-2019-6116 fix. A specially crafted PostScript file could use this flaw in order to, for example, have access to the file system outside of the constrains imposed by -dSAFER. Ghostscript versions before 9.27 are vulnerable.
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00088.html
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00090.html
https://access.redhat.com/errata/RHSA-2019:0971
https://access.redhat.com/errata/RHSA-2019:1017
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3839
https://lists.debian.org/debian-lts-announce/2019/05/msg00023.html
https://seclists.org/bugtraq/2019/May/23