The pdf14_open function in base/gdevp14.c in Artifex Software, Inc. Ghostscript 9.20 allows remote attackers to cause a denial of service (use-after-free and application crash) via a crafted file that is mishandled in the color management module.
http://git.ghostscript.com/?p=ghostpdl.git%3Ba=commit%3Bh=90fd0c7ca3efc1ddff64a86f4104b13b3ac969eb