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Public proof of conceptFix available

CVE-2021-40400

A public proof of concept exists; no exploitation attested.

  • Published2022-04-14
  • WeaknessCWE-119 · CWE-125

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An out-of-bounds read vulnerability exists in the RS-274X aperture macro outline primitive functionality of Gerbv 2.7.0 and dev (commit b5f1eacd) and the forked version of Gerbv (commit d7f42a9a). A specially-crafted Gerber file can lead to information disclosure. An attacker can provide a malicious file to trigger this vulnerability.

Timeline

dates in UTC
  1. 2022-04-1420:15CVE publishedNVD

Versions per branch

NVD
Gerbv project gerbv
BranchAffectedFixed in
2.7= 2.7.0no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA2 products

As talos, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Gerbv
    Affected
    • = 2.7.0no fix stated
    • = dev (commit b5f1eacd)no fix stated
  • Gerbv forked
    Affected
    • = dev (commit d7f42a9a)no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2022-04-14

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • gerbvUbuntu:Pro:22.04:LTSall versions · fixed in 2.8.2-1ubuntu0.1~esm1
  • gerbvUbuntu:Pro:18.04:LTSall versions · fixed in 2.6.1-3ubuntu0.1~esm1
  • gerbvUbuntu:Pro:16.04:LTSall versions · fixed in 2.6.0-1ubuntu0.16.04.1~esm1
  • gerbvUbuntu:Pro:14.04:LTSall versions · fixed in 2.6.0-1ubuntu0.14.04.1~esm1
  • gerbvUbuntu:20.04:LTSall versions · fixed in 2.7.0-1ubuntu0.1
  • gerbvMageia:8all versions · fixed in 2.7.3-1.mga8
  • gerbvDebian:13all versions · fixed in 2.9.2-1
  • gerbvDebian:12all versions · fixed in 2.9.2-1

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionpoc2025-04-15
  • NVDCVSS 3.17.5read 2026-10-23
  • CNACVSS 3.09.3known since 2026-10-23
  • NVDCVSS 2.05read 2026-10-23
  • CNAweakness (CWE)CWE-119known since 2026-10-23
  • NVDweakness (CWE)CWE-125read 2026-10-23
  • FIRST EPSSEPSS score1.3 %2026-11-08
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2022-04-14
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-6c2w-p226-q9q8

Frequently asked questions

What is CVE-2021-40400?

An out-of-bounds read vulnerability exists in the RS-274X aperture macro outline primitive functionality of Gerbv 2.7.0 and dev (commit b5f1eacd) and the forked version of Gerbv (commit d7f42a9a). A specially-crafted Gerber file can lead to information disclosure. An attacker can provide a malicious file to trigger this vulnerability.

Is CVE-2021-40400 actively exploited?

A proof-of-concept exploit exists for CVE-2021-40400, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2021-40400?

CVE-2021-40400 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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