An issue was discovered in Artifex Ghostscript before 9.26. LockSafetyParams is not checked correctly if another device is used.
www.securityfocus.com/bid/105990
access.redhat.com/errata/RHSA-2018:3834
bugs.ghostscript.com/show_bug.cgi?id=700176
git.ghostscript.com/?p=ghostpdl.git%3Ba=commit%3Bh=661e8d8fb8248c38d67958beda32f3a5876d0c3f
lists.debian.org/debian-lts-announce/2018/11/msg00036.html
security.gentoo.org/glsa/201811-12
usn.ubuntu.com/3831-1/
www.debian.org/security/2018/dsa-4346
www.ghostscript.com/doc/9.26/History9.htm#Version9.26