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The corresponding kernel part
Bug 1232557 - [6.7 FEAT] SMBIOS 3.0 update

*** Bug 1249888 has been marked as a duplicate of this bug. ***

I couldn't find any systems with SMBIOS 3 which could run RHEL 6, however dmidecode-2.12-7.el6 will install and run on a RHEL 7 system and I was able to verify it works with SMBIOS 3 on a RHEL 7 system.

(In reply to Mike Gahagan from comment #9)
> I couldn't find any systems with SMBIOS 3 which could run RHEL 6, however
> dmidecode-2.12-7.el6 will install and run on a RHEL 7 system and I was able
> to verify it works with SMBIOS 3 on a RHEL 7 system.

The package have been downloaded to my computer, however a smbios 3.0 machine need to be a 32-socket server which is busy doing other test. I will find a time slot to do test the new dmidecode rpm.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHEA-2016-0937.html