Advisories » MGAA-2017-0028

Updated microcode packages fix HT bug in Intel Skylake and Kaby Lake processors

Publication date: 22 Jul 2017
Modification date: 21 Jul 2017
Type: bugfix
Affected Mageia releases : 5 , 6

Description

This microcode update fixes a Hyperthreading bug in Intel
processor/microcode based on Skylake and Kaby Lake platforms (includes
Xeon v5 and v6 and some Pentium models).

This defect can, when triggered, cause unpredictable system behavior: it
could cause spurious errors, such as application and system misbehavior,
data corruption, and possible data loss.

Note, in order for the firmware to get loaded early in the boot process,
we suggest you recreate the initrd after installing this update.

To do so, open up a terminal window, use the command 'su -' to gain root
privilegies and then use the command 'dracut -f'. Rebooting the system
after that will make the new microcode being used.
                

References

• https://bugs.mageia.org/show_bug.cgi?id=21171
• https://www.intel.com/content/dam/www/public/us/en/documents/specification-updates/6th-gen-x-series-spec-update.pdf
• https://lists.debian.org/debian-devel/2017/06/msg00308.html
• https://tech.ahrefs.com/skylake-bug-a-detective-story-ab1ad2beddcd

SRPMS

5/nonfree

• microcode-0.20170707-1.mga5.nonfree

6/nonfree

• microcode-0.20170707-1.mga6.nonfree