ghostscript PDF14 compositor is vulnerable to denial of service(DoS) attacks. This is because it does not properly handle the copying of a device. An attacker could possibly exploit this to bypass the -dSAFER protection and crash ghostscript or possibly execute arbitrary code in the ghostscript context via a specially crafted PostScript document.
git.ghostscript.com/?p=ghostpdl.git;a=commit;h=c432131c3fdb2143e148e8ba88555f7f7a63b25e
access.redhat.com/errata/RHBA-2019:0327
access.redhat.com/errata/RHSA-2019:0229
access.redhat.com/security/updates/classification/#important
bugs.ghostscript.com/show_bug.cgi?id=699661
bugzilla.redhat.com/show_bug.cgi?id=1665919
lists.debian.org/debian-lts-announce/2018/09/msg00015.html
security.gentoo.org/glsa/201811-12
usn.ubuntu.com/3768-1/
www.artifex.com/news/ghostscript-security-resolved/
www.debian.org/security/2018/dsa-4288