Thanks for the info Russell.

I'm curious about the AMD thing though. My understand had always been that Intel had purchased/leased/whatever acquired the x86 64 bit extensions from AMD. Maybe its all the difference between the "meltdown" and the "spectre" vulnerability though.


Sparc, unless someone has updated news, remains unscathed, in addition to being (arguably) the most open CPU, MIPS fans argue that they are more open though.

Jerry


On 04/01/18 14:58, russell wrote:
Hi,

Lots of information, out there after the embargo was partially lifted (all the 
details have not been revealed).

https://www.forbes.com/sites/thomasbrewster/2018/01/04/google-microsoft-apple-updates-for-meltdown-spectre-intel-processor-vulnerabilities/#7ed5f9c95c3

Meltdown which breaks the most fundamental isolation between user applications and the operating system and reportedly effects virtually all Intel CPUs. ARM have indicated that the ARM A75 is effected by Meltdown, a variant of Meltdown (3a) effects the Cortex A15, A57 and A72 CPUs. AMD have indicated that they are not vulnerable due to a different architecture.

Spectre consists of two variants : -

                  Variant 1 which Intel, ARM and AMD CPU are all susceptible to 
this can be mitigated by OS patching.

Variant 2 which Intel and ARM are both susceptible, however AMD have indicated that this vulnerability has not been shown.


I suspect there will be additional vulnerabilities announced later, now that 
more people know the types of exploits to use.


Russell



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