The following updates has been released for Ubuntu Linux:
USN-3690-2: AMD Microcode regressionAMD Microcode and Firefox Updates for Ubuntu
USN-3690-1 provided updated microcode for AMD processors to address CVE-2017-5715 (aka Spectre). Unfortunately, the update caused some systems to fail to boot. This update reverts the update for Ubuntu 14.04 LTS.
USN-3705-1: Firefox vulnerabilities
Firefox could be made to crash or run programs as your login if it opened a malicious website.
