Use-after-free vulnerability in the CanonicalizeXPCOMParticipant function in Mozilla Firefox before 48.0 and Firefox ESR 45.x before 45.3 allows remote attackers to execute arbitrary code via a script that closes its own Service Worker within a nested sync event loop.
lists.opensuse.org/opensuse-security-announce/2016-08/msg00004.html
lists.opensuse.org/opensuse-security-announce/2016-08/msg00029.html
rhn.redhat.com/errata/RHSA-2016-1551.html
www.debian.org/security/2016/dsa-3640
www.mozilla.org/security/announce/2016/mfsa2016-73.html
www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
www.securityfocus.com/bid/92258
www.securitytracker.com/id/1036508
www.ubuntu.com/usn/USN-3044-1
bugzilla.mozilla.org/show_bug.cgi?id=1282992
security.gentoo.org/glsa/201701-15