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Public proof of concept

CVE-2021-40402

A public proof of concept exists; no exploitation attested.

  • Published2022-04-14
  • WeaknessCWE-125 · CWE-755

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 multiple outline primitives functionality of Gerbv 2.7.0 and dev (commit b5f1eacd), and Gerbv forked 2.7.1 and 2.8.0. 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
2.7= 2.7.1no fix published
2.8= 2.8.0no 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
    • = 2.7.1no fix stated
    • = 2.8.0no 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 · no fixed version listed
  • gerbvUbuntu:Pro:18.04:LTSall versions · no fixed version listed
  • gerbvUbuntu:Pro:16.04:LTSall versions · no fixed version listed
  • gerbvUbuntu:26.10all versions · no fixed version listed
  • gerbvUbuntu:26.04:LTSall versions · no fixed version listed
  • gerbvUbuntu:25.10all versions · no fixed version listed
  • gerbvUbuntu:24.04:LTSall versions · no fixed version listed
  • gerbvUbuntu:20.04:LTSall versions · no fixed version listed

2 more package ranges on OSV.dev

Vendor advisories

  • CVE-2021-40402 Red Hat Product Security

    gerbv: out-of-bounds read in the RS-274X aperture macro multiple outline primitives functionality

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-755known since 2026-10-23
  • NVDweakness (CWE)CWE-125read 2026-10-23
  • FIRST EPSSEPSS score1.5 %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-8x52-mcj6-x4gh

Frequently asked questions

What is CVE-2021-40402?

An out-of-bounds read vulnerability exists in the RS-274X aperture macro multiple outline primitives functionality of Gerbv 2.7.0 and dev (commit b5f1eacd), and Gerbv forked 2.7.1 and 2.8.0. A specially-crafted Gerber file can lead to information disclosure. An attacker can provide a malicious file to trigger this vulnerability.

Is CVE-2021-40402 actively exploited?

A proof-of-concept exploit exists for CVE-2021-40402, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2021-40402?

CVE-2021-40402 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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