In Artifex Ghostscript before 9.24, attackers able to supply crafted PostScript files could use a type confusion in the setcolor function to crash the interpreter or possibly have unspecified other impact.
git.ghostscript.com/?p=ghostpdl.git%3Ba=commit%3Bh=b326a71659b7837d3acde954b18bda1a6f5e9498
bugs.ghostscript.com/show_bug.cgi?id=699655
kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44101
lists.debian.org/debian-lts-announce/2018/09/msg00015.html
security.gentoo.org/glsa/201811-12
support.f5.com/csp/article/K22141757?utm_source=f5support&%3Butm_medium=RSS
usn.ubuntu.com/3768-1/
www.artifex.com/news/ghostscript-security-resolved/
www.debian.org/security/2018/dsa-4288