Use-after-free vulnerability in the FormAssociatedElement::formRemovedFromTree function in core/html/FormAssociatedElement.cpp in Blink, as used in Google Chrome before 33.0.1750.146, allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors involving FORM elements, as demonstrated by use of the speech-recognition feature.
https://src.chromium.org/viewvc/blink?revision=163825&view=revision
https://code.google.com/p/chromium/issues/detail?id=326854
http://www.securityfocus.com/bid/65930
http://www.debian.org/security/2014/dsa-2883
http://googlechromereleases.blogspot.com/2014/03/stable-channel-update.html