11.Locks IsometricPattern Esm W900

Made public earlier this year was Spectre-BHB / BHI as a speculative execution vulnerability similar to Spectre V2 and affecting Intel and Arm CPUs.

At the time Neoverse N2 / N1 / V1 and older cores like Cortex-A15 / A57 / A72 were known to be vulnerable and required software mitigations. The upcoming AmpereOne is also vulnerable to Spectre-BHB and has a patch now on its way to the Linux kernel for mitigating this Spectre class vulnerability.

Spectre-BHB targets the CPU's Branch History Buffer and affects a wide range of Arm cores. Arm's documentation around Spectre-BHB can be found via developer.arm.com.


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