Specific CPU microcode version triggers a kernel panic

Solution Verified - Updated -


  • A memory address that is stored in an unrelated CPU register is being dereferenced;
  • The %rip CPU register contains an invalid instruction pointer that typically points between 2 consecutive instructions.


  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • microcode_ctl package version 1.17-25.2.el6_9 or 2.1-22.2.el7
  • mostly seen on Intel E5-26XX v3 CPU series

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