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AMD is no more lucky than ARM, though Intel was ‘unlucky’: Spectre affects Intel, AMD, and ARM alike, while Meltdown Intel CPUs disproportionately (AMD and ARM
by electrograv 9y ago
AMD is no more lucky than ARM, though Intel was ‘unlucky’: Spectre affects Intel, AMD, and ARM alike, while Meltdown Intel CPUs disproportionately (AMD and ARM CPUs have been mostly unaffected by it).
- berkut 9y agoSome ARM CPUs are vulnerable to Meltdown: https://developer.arm.com/support/security-update https://developer.arm.com/support/security-update
- DSMan195276 9y agoThat's not entirely accurate. There are a lot of ARM CPUs that are not vulnerable to Spectre, and that includes a lot of them that are in use in actual devices. For example, my phone happens to use a Cortex-A53, which is not vulnerable. It is however easy to miss this detail from their 'security update' [0] because the table doesn't list CPUs that aren't affected. Also, I don't believe the single ARM CPU that's vulnerable to meltdown (Cortex-A75) has actually been included in any devices at this point, so for now it is safe to assume any ARM-based device you have is not vulnerable to meltdown. [0] https://developer.arm.com/support/security-update https://developer.arm.com/support/security-update
- Narishma 9y agoI believe Apple's ARM CPUs are vulnerable to Meltdown.
- colejohnson66 9y agoNot the Watch though. Apple, as expected, hasn’t said why.
- protomyth 9y agoProbably because its a much simpler core like all the other chips that are immune. It simply doesn't do the the logic that would get the chip in trouble.
- pkaye 9y agoThat is because a lot of ARM cores don't have out-of-order or speculation capabilities.
- deleted 9y ago[deleted]
- contrarian_ 9y agoAMD CPUs are completely unaffected by Meltdown, since AMD checks permissions before fetching memory into the cache.