Shortly after Red Hat stopped providing microcode to address variant 2 (branch target injection) of the Spectre attack, Intel has advised OEMs, cloud service providers, system manufacturers, software vendors and end users stop deployment of current firmware updates that fix the same vulnerability (CVE-2017-5715).
Red Hat’s decision
“Red Hat is no longer providing microcode to address Spectre, variant 2, due to instabilities introduced that are causing customer systems to not boot. The latest microcode_ctl and linux-firmware packages are reverting these unstable microprocessor firmware changes to versions that were known to be stable and well tested, released prior to the Spectre/Meltdown embargo lift date on Jan 3rd,” Red Hat announced last week.
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