# speed47/spectre-meltdown-checker

Reptar, Downfall, Zenbleed, ZombieLoad, RIDL, Fallout, Foreshadow, Spectre, Meltdown vulnerability/mitigation checker for Linux & BSD

Repository: https://github.com/speed47/spectre-meltdown-checker
Canonical: https://ross.abutalabs.com/products/spectre-meltdown-checker
Language: Shell
License Family: other
Topics: mitigation, meltdown, spectre, cve-2017-5753, cve-2017-5715, cve-2017-5754, cve-2018-3640, cve-2018-3639, foreshadow, cve-2018-3615, cve-2018-3620, cve-2018-3646, zombieload, cve-2019-11135, downfall, reptar
Last push: 2026-08-13T10:03:09+00:00

## Health v2 (maintenance only)
Score: 94/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 97, release rhythm 86, longevity 100
- inputs: {"age_days": 3160, "days_push": 20, "days_rel": 92, "gap_med": 15, "n_releases_24m": 4}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3947, forks 471 (observed 2026-08-28T04:08:30.287335+00:00)

## What it is
A self-contained shell script that checks Linux and BSD systems for vulnerability to transient execution CPU vulnerabilities such as Spectre, Meltdown, Foreshadow, ZombieLoad, Downfall, and Retbleed. It reports the system's exposure status and provides guidance on applying mitigations.

## Use cases
- check if my linux server is vulnerable to spectre and meltdown
- verify cpu mitigations are applied after a kernel update
- audit transient execution cve exposure on bsd
- find out if my system needs microcode updates for downfall or zenbleed
- check zombieload and ridl vulnerability status
- confirm spectre v2 mitigations before production deployment

## When to choose
- you need a dependency-free, single-script vulnerability audit for CPU speculative execution flaws on Linux or BSD
- you want detailed per-CVE status with mitigation guidance
- you are validating kernel or microcode patches for transient execution CVEs

## When to avoid
- you need general-purpose vulnerability scanning beyond CPU hardware flaws
- you are on Windows or macOS
- you need automated continuous security monitoring rather than a point-in-time check

## Facets
- artifact type: cli-tool
- maturity: active
- function: security, vulnerability-scanning, cli, developer-tools
- domain: security, operating-systems, hardware, developer-tools
- platform: bsd, cli
- tags: spectre, meltdown, cpu-vulnerabilities, transient-execution, shell-script, kernel-mitigations, cve-checker, linux

## Member repositories
- speed47/spectre-meltdown-checker (main) score 94

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:30.287335+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:24:34.628881+00:00, confidence not recorded.
  - readme: https://github.com/speed47/spectre-meltdown-checker (fetched 2026-08-28T04:08:30.287335+00:00, sha a8f84f1ff49d)
- Data as of 2026-08-30T08:39:29.467469+00:00.