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Re: Is Debian Linux protected against the Meltdown and Spectre security flaws?



Hi Stephen,

On Tue, Feb 20, 2018 at 10:09:52AM +0100, Stephan Seitz wrote:
> On Di, Feb 20, 2018 at 05:09:12 +0000, Andy Smith wrote:
> >CVE-2017-5753 is Spectre v1. There is no fix for Spectre v1 anywhere
> >yet, not even in Linux upstream.
> 
> Are you sure?

[…]

> >STATUS:  NOT VULNERABLE  (Mitigation: __user pointer sanitization)
> 
> Kernel is Linux 4.15.4 #1 SMP Sat Feb 17 23:19:56 CET 2018 x86_64, compiled
> myself with gcc 7.3 from testing.

Ah, I think you might be right that the known exploit for Spectre v1
is fixed now.

The commit message¹ speaks of infrastructure for future mitigations,
I think because further exploits are expected to be thought up for
this, but when they do I imagine they will have their own CVE
numbers (and names :)).

Cheers,
Andy

¹ https://lkml.org/lkml/2018/1/20/152

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