Use-after-free vulnerability in the HTMLMediaElement::didMoveToNewDocument function in core/html/HTMLMediaElement.cpp in Blink, as used in Google Chrome before 29.0.1547.57, allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors involving moving a (1) AUDIO or (2) VIDEO element between documents.
https://src.chromium.org/viewvc/blink?revision=154696&view=revision
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17571
http://www.debian.org/security/2013/dsa-2741
http://googlechromereleases.blogspot.com/2013/08/stable-channel-update.html