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Discussion on: Spectre & Meltdown: How does this affect mobile apps?

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Richard Taylor

There are two variants of the Spectre bug that impact ARM cores. Variant #1 can potentially allow JavaScript to break out of its sandbox and read other memory from the process of the browser. Variant #2 is a lot more difficult to setup but could potentially allow one app to read the data of another. This is theoretical, is very difficult to do in practice and hasn't been shown on an ARM device as far as a I know but there is certainly a risk. See my summary of the bugs at and I also plan to write about the impact to mobile apps in particular.