Researchers detail three new Intel and AMD Spectre vulnerabilities – Engadget

For CPU makers, one of the biggest concerns will be the efficiency impacting mitigation procedures outlined by the researchers, including the flushing of the micro-op cache at domain crossings or advantage level-based partitioning of the caches. The first of the trio of possible exploits is a same thread cross-domain attack that leaks tricks across the user kernel limit. A different variant relies on a cross-SMT thread attack that sends tricks throughout two SMT threads via the micro-op cache. The paper likewise explains “short-term execution attacks” that can be utilized “to leakage an unapproved secret accessed along a misspeculated course, even prior to the transient instruction is dispatched to execution.

The first of the trio of possible exploits is an exact same thread cross-domain attack that leaks tricks throughout the user kernel border. A different variant relies on a cross-SMT thread attack that transfers tricks across two SMT threads through the micro-op cache. The paper likewise explains “short-term execution attacks” that can be used “to leak an unauthorized secret accessed along a misspeculated path, even prior to the short-term direction is dispatched to execution.

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