Use-after-free vulnerability in the Document::finishedParsing function in core/dom/Document.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 an onload event that changes an IFRAME element so that its src attribute is no longer an XML document, leading to unintended garbage collection of this document.
https://src.chromium.org/viewvc/blink?revision=154680&view=revision
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18550
http://www.debian.org/security/2013/dsa-2741
http://googlechromereleases.blogspot.com/2013/08/stable-channel-update.html