Security readout for executives and security teams
Plain-English summary
Gerbv can be compromised when it parses a specially crafted PCB Gerber file. The reported impact includes code execution, so vulnerable engineering workstations or automated file-processing systems should be treated as high urgency if they handle untrusted Gerber files.
Executive priority
Prioritize remediation where Gerbv handles external Gerber files. The business risk is compromise of engineering or manufacturing systems through routine file review or processing.
Technical view
CVE-2021-40401 is a use-after-free in Gerbv RS-274X aperture definition tokenization. Sources identify Gerbv 2.7.0, dev commit b5f1eacd, and forked 2.7.1 as affected. A malicious Gerber file can trigger the flaw and potentially execute code.
Likely exposure
Exposure is most likely in electronics design, manufacturing, review, or conversion workflows using vulnerable Gerbv versions to parse Gerber files, especially files received from customers, suppliers, or public sources.
Exploitation context
The source bundle says a specially crafted Gerber file can lead to code execution. CISA KEV is false, and the provided sources do not establish active exploitation in the wild.
Researcher notes
Evidence is strong for affected versions and impact, but the bundle does not provide exploit telemetry. The CWE listed is CWE-252, while the vulnerability description characterizes the bug as use-after-free.
Mitigation direction
- Inventory Gerbv installations and forked Gerbv builds.
- Apply relevant Debian or Fedora security updates where applicable.
- Check Gerbv or distribution guidance for fixed versions.
- Avoid processing untrusted Gerber files until patched.
- Isolate any necessary parsing of external Gerber files.
Validation and detection
- Verify installed Gerbv versions are not listed as affected.
- Review SBOMs, workstations, CI images, and conversion services for Gerbv.
- Confirm Debian or Fedora package advisories are applied where relevant.
- Identify workflows that accept Gerber files from external parties.
- Document any remaining vulnerable systems and compensating controls.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-252: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-40401 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 10 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:H3.96Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
10CriticalVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1415CVE reference
- FEDORA-2022-4a3ef86baaCVE reference · vendor-advisory
- DSA-5306CVE reference · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Unchecked Return Value
Unchecked Return Value represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.