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This updated microcode supersedes microcode provided by Red Hat with
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the CVE-2017-5715 (“Spectre”) CPU branch injection vulnerability
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mitigation.
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Historically, Red Hat has provided updated microcode, developed by our
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microprocessor partners, as a customer convenience. Red Hat had
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temporarily suspended this practice while microcode stabilized. Red
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Hat is once again providing an updated Intel microcode package
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(microcode_ctl) and AMD microcode package (linux-firmware) to customers
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in order to simplify deployment processes and minimize downtime. We’ll
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continue to update these microcode packages as necessary. Please
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contact your hardware vendor to determine whether more recent
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BIOS/firmware updates are recommended because additional improvements
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may be available.
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This kbase https://access.redhat.com/articles/3436091 includes a table
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that maps Intel and AMD CPU processor code family names to updated
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Intel and AMD microcode package versions.
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