Use-after-free vulnerability in the ServiceWorkerInfo class in the Service Worker subsystem in Mozilla Firefox before 46.0 allows remote attackers to execute arbitrary code via vectors related to the BeginReading method.
lists.opensuse.org/opensuse-security-announce/2016-05/msg00005.html
lists.opensuse.org/opensuse-updates/2016-05/msg00038.html
www.mozilla.org/security/announce/2016/mfsa2016-42.html
www.securitytracker.com/id/1035692
www.ubuntu.com/usn/USN-2936-1
www.ubuntu.com/usn/USN-2936-2
www.ubuntu.com/usn/USN-2936-3
bugzilla.mozilla.org/show_bug.cgi?id=1252330
security.gentoo.org/glsa/201701-15