Comment 2 for bug 1837005

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Po-Hsu Lin (cypressyew) wrote : Re: cve-2015-3290 in cve from ubuntu_ltp failed with D-i386

From the description of this CVE[1]:
arch/x86/entry/entry_64.S in the Linux kernel before 4.1.6 on the x86_64
platform improperly relies on espfix64 during nested NMI processing, which
allows local users to gain privileges by triggering an NMI within a certain
instruction window.

It looks like this is x86_64 specific.