[grsec] Hyperthreading and Xeon x86_64's

[coderman]

On 12/10/05, Gian G. Spicuzza <gianspi at gsent.org> wrote:
> Hyperthreading does have a security vulnerability.  I don't know if it
> affects grsec patched kernels.

there are similar cache based side channel attacks against certain
block ciphers exploitable remotely:
http://cr.yp.to/antiforgery/cachetiming-20050414.pdf

both of these issues are probably outside the threat model grsecurity aims for.

[is there a formal threat model defined for grsecurity?]