Security researcher Abhishek Arya (Inferno) of the Google Chrome Security Team reported a use-after-free vulnerability when the alt key is used in conjunction with toplevel menu items in Firefox. This results in a potentially exploitable crash when triggered. This vulnerability is mitigated by not being triggerable by web content, only direct user interaction with the keyboard.
Name: the Mozilla project
Upstream: Abhishek Arya
This issue has been addressed in the following products:
Red Hat Enterprise Linux 5
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Via RHSA-2016:1551 https://rhn.redhat.com/errata/RHSA-2016-1551.html