Hardware bugs affecting popular makes and models of CPU have been in the news a lot this year. One of the more recent revelations has been the L1 Terminal Fault attack, mostly known by its ominous-sounding name Foreshadow. The Red Hat team has put together a series of blog posts which explain the Foreshadow issue, how it works and why it is a problem. While CPU bugs have serious security implications, Red Hat reports the fix should be relatively painless for Foreshadow: "The L1TF attack against bare metal machines is trivial to mitigate through a few lines of kernel code (that is available in all of our errata releases, and has also been submitted for inclusion in upstream Linux). This mitigation has no measurable performance impact and requires systems be promptly patched."
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