Intel Processors Hit by "Lazy FP State Restore" Vulnerability

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Security researchers have found a vulnerability affecting all fashionable Intel Core and Xeon processors, which is an exploit of a efficiency optimization feature referred to as “lazy FP state restore,” which will be exploited to smell out delicate info, together with cryptographic keys used to guard delicate knowledge. The flaw impacts all x86 micro-architectures by Intel, “Sandy Bridge” and later.

The “lazy FP state restore” feature is a set of instructions used to briefly retailer or restore the FPU states of purposes operating “lazily” (versus “eagerly”). Pink Hat put out an advisory stating that numbers held in FPU registers may very well be used to entry delicate details about the actions of different purposes, together with encryption keys. Intel started working with fashionable OS distributors to shortly roll out software patches in opposition to the vulnerability.


Sources:
Intel, Red Hat, TheHackerNews

Source : TechPowerUp

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