The LocalFrame::isURLAllowed function in core/frame/LocalFrame.cpp in Blink, as used in Google Chrome before 44.0.2403.89, does not properly check for a page's maximum number of frames, which allows remote attackers to cause a denial of service (invalid count value and use-after-free) or possibly have unspecified other impact via crafted JavaScript code that makes many createElement calls for IFRAME elements.
http://googlechromereleases.blogspot.com/2015/07/stable-channel-update_21.html
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00038.html
http://rhn.redhat.com/errata/RHSA-2015-1499.html
https://code.google.com/p/chromium/issues/detail?id=493243
https://security.gentoo.org/glsa/201603-09
https://src.chromium.org/viewvc/blink?revision=197139&view=revision