Skip to main content
No exploitation reportedFix available

CVE-2021-40394

No exploitation reported by the sources we read.

  • Published2021-12-22
  • WeaknessCWE-787

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 write vulnerability exists in the RS-274X aperture macro variables handling functionality of Gerbv 2.7.0 and dev (commit b5f1eacd) and the forked version of Gerbv (commit 71493260). A specially-crafted gerber file can lead to code execution. An attacker can provide a malicious file to trigger this vulnerability.

Timeline

dates in UTC
  1. 2021-12-2219:15CVE publishedNVD

Versions per branch

NVD
Debian debian linux
BranchAffectedFixed in
9.0= 9.0no fix published
10.0= 10.0no fix published
11.0= 11.0no fix published
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.

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 2.8.1-1
  • gerbvDebian:12all versions · fixed in 2.8.1-1

2 more package ranges on OSV.dev

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

  • NVDCVSS 3.19.8read 2026-10-23
  • CNACVSS 3.010known since 2026-10-23
  • NVDCVSS 2.07.5read 2026-10-23
  • NVDweakness (CWE)CWE-787read 2026-10-23
  • FIRST EPSSEPSS score3.0 %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:H/A:H
Published
2021-12-22
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-936x-jwpc-5p28

Frequently asked questions

What is CVE-2021-40394?

An out-of-bounds write vulnerability exists in the RS-274X aperture macro variables handling functionality of Gerbv 2.7.0 and dev (commit b5f1eacd) and the forked version of Gerbv (commit 71493260). A specially-crafted gerber file can lead to code execution. An attacker can provide a malicious file to trigger this vulnerability.

Is CVE-2021-40394 actively exploited?

Active exploitation of CVE-2021-40394 has not been confirmed. Its EPSS score was 3.0% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-40394?

CVE-2021-40394 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Running gerbv? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, November 2026Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database

Sources for this record