Movim • Linux Inadvertently Has Been Leaving IBRS-Mitigated Systems Without STIBP

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people 222 subscribers • Linux Hardware Reviews, Open-Source Benchmarks & Linux Performance

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Linux Inadvertently Has Been Leaving IBRS-Mitigated Systems Without STIBP

news.movim.eu / Phoronix • 27 February, 2023

The Linux kernel since last year has mistakenly left systems relying on the original Indirect Branch Restricted Speculation (IBRS) for Spectre V2 mitigation without Single Threaded Indirect Branch Predictor (STIBP) coverage for cross-HyperThread dealing with this Spectre vulnerability. There is a patch underway that is resolving this issue for Intel Skylake era systems...

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