Why is "bhi" displayed in bugs: field of /proc/meminfo after upgrading to 8.10.z - kernel-4.18.0-553.30.1.el8_10 ?

Solution Verified - Updated -

Issue

  • Why is "bhi" displayed in bugs: field of /proc/meminfo after upgrading to 8.10.z - kernel-4.18.0-553.30.1.el8_10 ?
    Before
    bugs: cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs itlb_multihit mmio_stale_data
    After
    bugs: cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs itlb_multihit mmio_stale_data bhi

  • Does this mean that the system is vulnerable to Branch History Injection?

Environment

  • Red Hat Enterprise Linux 8.10.z
  • CVE-2024-2201
    • BHI (Branch History Injection)

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