extensions/renderer/render_frame_observer_natives.cc in Google Chrome before 49.0.2623.75 does not properly consider object lifetimes and re-entrancy issues during OnDocumentElementCreated handling, which allows remote attackers to cause a denial of service (use-after-free) or possibly have unspecified other impact via unknown vectors.
https://security.gentoo.org/glsa/201603-09
https://codereview.chromium.org/1684953002
https://code.google.com/p/chromium/issues/detail?id=585268
http://www.securitytracker.com/id/1035185
http://www.securityfocus.com/bid/84008
http://www.debian.org/security/2016/dsa-3507
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00028.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00018.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00015.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00014.html
http://googlechromereleases.blogspot.com/2016/03/stable-channel-update.html