Windows 10: Kernel memory leaking Intel processor design flaw

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  1.    04 Jan 2018 #50

    So it is not the same ? "disclosed to Intel" and "when Intel first knew about this" ?
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  2. Posts : 2,745
    W10 Pro + W10 Preview
       04 Jan 2018 #51

    This article was dated last November 14th.

    Alex Ionescu on Twitter:
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  3. Posts : 311
    Windows 10 Home April 2018 Update 64-bit
       04 Jan 2018 #52

    Why are AMD mentioned very rarely in articles? I only read Intel this and Intel that, but according to the Meltown.com AMD is also affected by Spectre: Or is this kernel memory a completely different horse

    Meltdown.com said:
    Almost every system is affected by Spectre: Desktops, Laptops, Cloud Servers, as well as Smartphones. More specifically, all modern processors capable of keeping many instructions in flight are potentially vulnerable. In particular, we have verified Spectre on Intel, AMD, and ARM processors.
    And Meltdown is not completely ruled out for AMD:

    Meltdown.com said:
    At the moment, it is unclear whether ARM and AMD processors are also affected by Meltdown.
    Is Intel in the spotlight because they will be hit the hardest in terms of performance with these patches? I did a few benchmark on my PC (Haswell) using Crystaldisk to see how the I/O is affected, and the only degradation I saw was in the 4KBQ1 test for writing. Not sure how this will affect much. I will try and launch a few games later aswell that's cache and CPU heavy and see how they fair.
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  4.    04 Jan 2018 #53

    Absent specific performance hits relative to the Intel processor installed, I've disabled the Windows 10 update service on my oldest laptop (core 2 T 7500 @ 2.2Ghz). I'm now thinking about doing the same for our other machines.

    I thought I read that these OS patches were temporary pending Intel coming up with a more clever fix that doesn't take a (presumed) hammer to performance.

    Mark
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  5.    04 Jan 2018 #54

    Faith said: View Post
    Why are AMD mentioned very rarely in articles? I only read Intel this and Intel that, but according to the Meltown.com AMD is also affected by Spectre: Or is this kernel memory a completely different horse



    And Meltdown is not completely ruled out for AMD:



    Is Intel in the spotlight because they will be hit the hardest in terms of performance with these patches? I did a few benchmark on my PC (Haswell) using Crystaldisk to see how the I/O is affected, and the only degradation I saw was in the 4KBQ1 test for writing. Not sure how this will affect much. I will try and launch a few games later aswell that's cache and CPU heavy and see how they fair.
    i think the original el reg article was talking more about meltdown which is mostly an intel thing. intel talks about everyone getting hit but that's more about spectre
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  6.    04 Jan 2018 #55

    Faith said: View Post
    Why are AMD mentioned very rarely in articles?
    Because the bug is in Intel CPU.

    If MS put the same style of fix as Linux did then you'll be hit by the performance degradation (if any) irrespective of whether you use Intel or AMD as the fix (in Linux kernel anyway) doesn't differentiate.
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  7.    04 Jan 2018 #56

    Seems to be three different exploits, AMD's take on it An Update on AMD Processor Security | AMD.
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  8.    04 Jan 2018 #57

    clam1952 said: View Post
    Seems to be three different exploits, AMD's take on it An Update on AMD Processor Security | AMD.
    Interesting, thanks. Seems I was wrong about it being Intel only.

    It is certainly a confusing state of affairs.
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  • Posts : 10,707
    Windows 10 Pro and Windows 10 Pro Insider
       04 Jan 2018 #58

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  • Posts : 19,902
    Win 7 32, Win 7 64 Pro, Win 8.1 64 Pro, Win 10 64 Education Edition
       04 Jan 2018 #59

    Windows Meltdown-Spectre patches: If you haven't got them, blame your antivirus


    Microsoft has warned users that its patches for the dangerous Meltdown CPU bug won't reach them if their third-party antivirus hasn't been updated to support this week's Windows security update.

    By now Windows users should have received the patches Microsoft released yesterday to plug the widespread Meltdown bug and its companion Spectre, which expose most computers and phones to speculative execution side-channel attacks that affect chips from Intel, AMD, and Arm.

    Microsoft released software updates for Internet Explorer, Microsoft Edge, Windows, and SQL Server, but customers will also need to apply firmware updates from their respective hardware vendors too.
    Windows Meltdown-Spectre patches: If you haven't got them, blame your antivirus | ZDNet
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