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Huge Intel CPU Bug Allegedly Causes Kernel Memory Vulnerability With Up To 30% Performance Hit

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Greetings,

And happy new year.

This is hitting all of us soon.
In short : a huge (and long lasting) hardware bug, present in about all 
Intel CPUs that have been sold for the last 10 years.
It is not fixable by microcode, and requires ugly patching from the 
kernel layer. Other OSes such as Microsoft are concerned as well.

Nice overview of the thing :
https://hothardware.com/news/intel-cpu-bug-kernel-memory-isolation-linux-windows-macos

More detail :
http://pythonsweetness.tumblr.com/post/169166980422/the-mysterious-case-of-the-linux-page-table

Linus' patch :
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5aa90a84589282b87666f92b6c3c917c8080a9bf


Vincent Deffontaines

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Huge Intel CPU Bug Allegedly Causes Kernel Memory Vulnerability With  Up To 30% Performance Hit Vincent Deffontaines <vincent@gryzor.com> - 2018-01-03 12:00 +0100
  Re: Huge Intel CPU Bug Allegedly Causes Kernel Memory Vulnerability  With  Up To 30% Performance Hit Henrique de Moraes Holschuh <hmh@debian.org> - 2018-01-03 15:10 +0100
  Re: Huge Intel CPU Bug Allegedly Causes Kernel Memory Vulnerability  With Up To 30% Performance Hit Pavel Alyev <aliech@aliech.ru> - 2018-01-03 17:00 +0100
    Re: Huge Intel CPU Bug Allegedly Causes Kernel Memory Vulnerability  With Up To 30% Performance Hit Waylon Robertson <wrobertson1981@gmail.com> - 2018-01-04 00:40 +0100
    Re: Huge Intel CPU Bug Allegedly Causes Kernel Memory Vulnerability With Up To 30% Performance Hit Rushan <debsec@irush.su> - 2018-01-04 12:40 +0100

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