content/browser/webui/content_web_ui_controller_factory.cc in Google Chrome before 43.0.2357.130 does not properly consider the scheme in determining whether a URL is associated with a WebUI SiteInstance, which allows remote attackers to bypass intended access restrictions via a similar URL, as demonstrated by use of http://gpu when there is a WebUI class for handling chrome://gpu requests.
http://googlechromereleases.blogspot.com/2015/06/chrome-stable-update.html
http://lists.opensuse.org/opensuse-updates/2015-06/msg00057.html
http://lists.opensuse.org/opensuse-updates/2015-11/msg00012.html
http://rhn.redhat.com/errata/RHSA-2015-1188.html
https://code.google.com/p/chromium/issues/detail?id=464922
https://codereview.chromium.org/1129123004/
https://security.gentoo.org/glsa/201507-18
http://www.debian.org/security/2015/dsa-3315