Openwall GNU/*/Linux - a small security-enhanced Linux distro for servers
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Date: Thu, 21 Jun 2018 08:11:42 -0700
From: Gordon Tetlow <>
Subject: Re: Intel hyper-threading security issues

On Thu, Jun 21, 2018 at 4:58 AM, Georgi Guninski <> wrote:
> On Thu, Jun 21, 2018 at 07:56:42AM +0300, Georgi Guninski wrote:
>> V.   Solution
>> Disable Hyper-Threading Technology on processors that support it.
> Is Freebsd safe from this or requires patch?

FreeBSD allows disabling of HT processors if the user decides to do so.

Add to /boot/loader.conf:

And reboot the host.

Please note this isn't an endorsement of disabling HT, just an
explanation of how to do so on FreeBSD.


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