On January 3, 2018, it became public that CPU data cache timing can be abused by software to efficiently leak information out of mis-speculated CPU execution, leading to (at worst) arbitrary virtual memory read vulnerabilities across local security boundaries in various contexts.
Three variants have been recently discovered by Google Project Zero and other security researchers; these can affect many modern processors, including certain processors by Intel, AMD and ARM.
For more information see KB52245
Virtual Maestro 
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