The gs_makewordimagedevice function in base/gsdevmem.c in Artifex Software, Inc. Ghostscript 9.20 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted file that is mishandled in the PDF Transparency module. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-10220
