CPU "model 79" systems hangs/panics during boot following an update to the microcode_ctl package

Solution Verified - Updated -


  • After applying patches for CVE-2017-5754 CVE-2017-5753 and CVE-2017-5715, system poweroff during boot
  • After upgrade to microcode_ctl-1.17-25.2, the system is powered off during boot.
  • After update, the system hangs during boot with the following messages on the console:

    microcode: CPU0 sig=0x406f1, pf=0x1, revision=0xb00001f
    platform microcode: firmware: requesting intel-ucode/06-4f-01


  • Red Hat Enterprise Linux (RHEL) 7

    • microcode_ctl-2.1-29.10.el7_5.x86_64
    • microcode_ctl-2.1-29.el7.x86_64
    • microcode_ctl-2.1-22.5.el7_4.x86_64
    • microcode_ctl-2.1-22.2.el7.x86_64
    • microcode_ctl-2.1-22.el7.x86_64
    • microcode_ctl-2.1-16.13.el7_3.x86_64
    • microcode_ctl-2.1-16.5.el7_3.x86_64
    • microcode_ctl-2.1-16.4.el7_3.x86_64
    • microcode_ctl-2.1-16.3.el7_3.x86_64
    • microcode_ctl-2.1-16.1.el7_3.x86_64
    • microcode_ctl-2.1-16.el7.x86_64
    • microcode_ctl-2.1-12.el7_2.2.x86_64
  • Red Hat Enterprise Linux (RHEL) 6

    • microcode_ctl-1.17-33.3.el6_10
    • microcode_ctl-1.17-25.4.el6_9
    • microcode_ctl-1.17-25.2.el6_9
    • microcode_ctl-1.17-25.el6
    • microcode_ctl-1.17-20.8.el6_7
    • microcode_ctl-1.17-19.8.el6_6
    • microcode_ctl-1.17-17.10.el6_5
    • microcode_ctl-1.17-16.8.el6_4
  • Intel model 79 CPUs. The following models have been reported to experience the issue (not inclusive list)

    Intel(R) Xeon(R) CPU E5-2637 v4 @ 3.50GHz
    Intel(R) Xeon(R) CPU E5-2643 v4 @ 3.40GHz
    Intel(R) Xeon(R) CPU E5-2667 v4 @ 3.20GHz
    Intel(R) Xeon(R) CPU E5-2667 v4 @ 3.50GHz

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