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I seek some reliable ways / tools for checking Spectre and Meltdown system vulnerabilities on Linux?

That are currently the following CVEs:

  • CVE-2017-5753 [bounds check bypass] aka Spectre Variant 1

  • CVE-2017-5715 [branch target injection] aka Spectre Variant 2

  • CVE-2017-5754 [rogue data cache load] aka Meltdown aka Variant 3

  • CVE-2018-3640 [rogue system register read] aka Variant 3a

  • CVE-2018-3639 [speculative store bypass] aka Variant 4

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I have found one good and maintained script on GitHub (link).

Usage is as simple as running the script with superuser privileges, e.g.:

sudo ./spectre-meltdown-checker.sh

Possible result with proper patches in place:

spectre & meltdown checker result

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