core/loader/ImageLoader.cpp in Blink, as used in Google Chrome before 44.0.2403.89, does not properly determine the V8 context of a microtask, which allows remote attackers to bypass Content Security Policy (CSP) restrictions by providing an image from an unintended source.
https://src.chromium.org/viewvc/blink?revision=196071&view=revision
https://security.gentoo.org/glsa/201603-09
https://code.google.com/p/chromium/issues/detail?id=487155
http://www.securitytracker.com/id/1033031
http://www.securityfocus.com/bid/75973
http://www.debian.org/security/2015/dsa-3315
http://rhn.redhat.com/errata/RHSA-2015-1499.html
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00038.html
http://googlechromereleases.blogspot.com/2015/07/stable-channel-update_21.html