Mozilla developers and community members reported 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. Christoph Diehl, Julian Hector, Jan de Mooij, Mats Palmgren, and Tooru Fujisawa reported memory safety problems and crashes that are fixed in Firefox 47. External Reference: https://www.mozilla.org/security/announce/2016/mfsa2016-49.html Acknowledgements: Name: the Mozilla project Upstream: Christoph Diehl, Julian Hector, Jan de Mooij, Mats Palmgren, and Tooru Fujisawa Statement: This issue does not affect the version of firefox and thunderbird as shipped with Red Hat Enterprise Linux 5, 6 and 7.