The Extensions subsystem in Google Chrome before 49.0.2623.75 does not properly maintain own properties, which allows remote attackers to bypass intended access restrictions via crafted JavaScript code that triggers an incorrect cast, related to extensions/renderer/v8_helpers.h and gin/converter.h.
googlechromereleases.blogspot.com/2016/03/stable-channel-update.html
lists.opensuse.org/opensuse-security-announce/2016-03/msg00014.html
lists.opensuse.org/opensuse-security-announce/2016-03/msg00015.html
lists.opensuse.org/opensuse-security-announce/2016-03/msg00018.html
lists.opensuse.org/opensuse-security-announce/2016-03/msg00028.html
www.debian.org/security/2016/dsa-3507
www.securityfocus.com/bid/84008
www.securitytracker.com/id/1035185
code.google.com/p/chromium/issues/detail?id=549986
codereview.chromium.org/1433293004
security.gentoo.org/glsa/201603-09