CVE-2015-6779
PDFium, as used in Google Chrome before 47.0.2526.73, does not properly restrict use of chrome: URLs, which allows remote attackers to bypass intended scheme restrictions via a crafted PDF document, as demonstrated by a document with a link to a URL.
Date published : 2015-12-05
http://www.securityfocus.com/bid/78416
http://googlechromereleases.blogspot.com/2015/12/stable-channel-update.html
