CVE-2021-40401

Name: CVE-2021-40401
Creator: NVD / NIST
Published: 2022-02-04T23:15:11.833+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.6/10EPSS 1.22%

Last modified Jun 17, 2026

CVE-2021-40401 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. A use-after-free vulnerability exists in the RS-274X aperture definition tokenization functionality of Gerbv 2.7.0 and dev (commit b5f1eacd) and Gerbv forked 2.7.1. A specially-crafted gerber file can lead to code execution. EPSS estimates a 1.22% chance of exploitation in the next 30 days.

Description

A use-after-free vulnerability exists in the RS-274X aperture definition tokenization functionality of Gerbv 2.7.0 and dev (commit b5f1eacd) and Gerbv forked 2.7.1. A specially-crafted gerber file can lead to code execution. An attacker can provide a malicious file to trigger this vulnerability.

Metrics

CVSS 3.1

8.6/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

EPSS Probability

1.22%

64.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Gerbv Project	Gerbv	2.7.0	—
Gerbv Project	Gerbv	2.7.1	Forked Dev
Fedoraproject	Fedora	36	—
Debian	Debian Linux	11.0	—

References

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TUM5GIUZJ7AVHVCXDZW6ZVCAPV2ISN47/
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1415Exploit, Third Party Advisory
https://www.debian.org/security/2022/dsa-5306Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TUM5GIUZJ7AVHVCXDZW6ZVCAPV2ISN47/
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1415Exploit, Third Party Advisory
https://www.debian.org/security/2022/dsa-5306Third Party Advisory

Timeline

Published: Feb 4, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-40401?

How severe is CVE-2021-40401?

CVE-2021-40401 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 1.22% probability of exploitation in the next 30 days.

How do I fix CVE-2021-40401?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-40401?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST