MCE(Machine Check Event) are normally appear due to hardware fault in the system. More likely faulty DIMM or CPU. If mcelogd is enabled in the system you can see /var/log/mcelog file is the system and below message in the file :

HARDWARE ERROR. This is *NOT* a software problem!
Please contact your hardware vendor
CPU 11 BANK 3 TSC 35808899975fc 
ADDR 294fc0 
STATUS 9420008c0001010a MCGSTATUS 0
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