Spectre rears its ugly head again as researchers show some RISC-V chips are susceptible

If you thought that the famous Spectre security vulns were a relic of 2018, think again. Certain RISC-V chips are still very much subject to this hair-raising hole, researchers say. Spectre refers to a family of vulnerabilities related to speculative execution, a performance optimization technique based on predicting the flow of data before instructions have been executed. Incorrect predictions get rolled back without affecting running applications but nonetheless leave traces that can be recovered and exploited to violate memory protections and access secrets. Spectre flaws have dogged x86 and ARM chips for years, leading computer scientists to develop a series of defenses, including Indirect Branch Restricted Speculation (IBRS), Indirect...

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