A use-after-free during web animations when working with timelines resulting in a potentially exploitable crash. External References: https://www.mozilla.org/en-US/security/advisories/mfsa2016-89/#CVE-2016-9068
Acknowledgments: Name: the Mozilla project Upstream: Nils
Statement: This issue does not affect the version of firefox and thunderbird as shipped with Red Hat Enterprise Linux 5, 6 and 7.