CONFIG_MITIGATION_SRBDS: Mitigate Special Register Buffer Data Sampling (SRBDS) hardware bug

General informations

The Linux kernel configuration item CONFIG_MITIGATION_SRBDS:

• prompt: Mitigate Special Register Buffer Data Sampling (SRBDS) hardware bug
• type: bool
• depends on: CONFIG_CPU_SUP_INTEL
• defined in arch/x86/Kconfig
• found in Linux kernels: 6.12–6.13, 6.14-rc+HEAD

Help text

Enable mitigation for Special Register Buffer Data Sampling (SRBDS). SRBDS is a hardware vulnerability that allows Microarchitectural Data Sampling (MDS) techniques to infer values returned from special register accesses. An unprivileged user can extract values returned from RDRAND and RDSEED executed on another core or sibling thread using MDS techniques. See also Documentation/admin-guide/hw-vuln/special-register-buffer-data-sampling.rst

Hardware

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The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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