CVE-2022-23947

Code execution via unbounded DCodeNumber copy

Published Feb 4, 2022 · Updated Apr 15, 2025

Stack-based buffer overflow in KiCad 6.0.1 and earlier allows attackers to execute code through a crafted Gerber or Excellon file. The Gerber Viewer's DCodeNumber parser copies every number-like character into a 1,024-byte stack buffer without checking its length before adding a terminator. Exploitation requires a user to open the file in GerbView; a crash is straightforward, while code execution depends on the exact build and its mitigations.

CVSS severity7.8
High
EPSS probability1.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in KiCad 6.0.1 and earlier allows attackers to execute code through a crafted Gerber or Excellon file. The Gerber Viewer's DCodeNumber parser copies every number-like character into a 1,024-byte stack buffer without checking its length before adding a terminator. Exploitation requires a user to open the file in GerbView; a crash is straightforward, while code execution depends on the exact build and its mitigations.

The record

CVE
CVE-2022-23947
Published
Feb 4, 2022
Updated
Apr 15, 2025
Vendor
KiCad Development Team
Product
KiCad
Classifications
CWE-787, CWE-121, T1203, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 4, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=KiCad EDA 6.0.1,KiCad EDA master commit de006fc010

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

KiCad Development Team · KiCadversion=KiCad EDA 6.0.1,KiCad EDA master commit de006fc010

Published CVSS scores

7.8Cisco TalosCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-121Stack-based Buffer Overflow
T1203Exploitation for Client Execution
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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