Mozilla developers and fixed several memory safety bugs in the browser engine used in Firefox and other Mozilla-based products. Some of these bugs showed evidence of memory corruption under certain circumstances, and we presume that with enough effort at least some of these could be exploited to run arbitrary code. 

Carsten Book, Christoph Diehl, Christian Holler, Andrew McCreight, Daniel Holbert, Gian-Carlo Pascutto, Tyson Smith, Andrea Marchesini, and Jukka Jylänki reported memory safety problems and crashes that affect Firefox 44.


External Reference:

https://www.mozilla.org/security/announce/2016/mfsa2016-16.html


Acknowledgements:

Name: the Mozilla project
Upstream: Carsten Book, Christoph Diehl, Christian Holler, Andrew McCreight, Daniel Holbert, Gian-Carlo Pascutto, Tyson Smith, Andrea Marchesini, Jukka Jylänki


Statement:

This issue does not affect the version of firefox and thunderbird as shipped with Red Hat Enterprise Linux 5, 6 and 7.