CVE-2023-38623: GTKWave · Integer Overflow or Wraparound
Affects GTKWaveSource CVE Database V5
Not known to be exploited · CVSS 7.8 High.
Data as of 25 Oct 2026, 19:02 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 37% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 8 Jan 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| GTKWave GTKWave | Affected
| Fixed in– |
AI-suggested
Organizations should immediately update GTKWave to a patched version once available. Until a patch is released, users should avoid opening .vzt files from untrusted or unknown sources. Implement strict file validation and sandboxing measures when handling waveform files. Employ endpoint protection solutions capable of detecting anomalous behavior during file parsing. Incorporate user training to recognize suspicious files and phishing attempts. Network segmentation can limit the impact of a compromised workstation. Additionally, consider using alternative waveform viewers that do not share this vulnerability or running GTKWave in isolated virtual environments. Monitoring for unusual process behavior or memory corruption events related to GTKWave can provide early detection of exploitation attempts.
Description
Multiple integer overflow vulnerabilities exist in the VZT facgeometry parsing functionality of GTKWave 3.3.115. A specially crafted .vzt file can lead to arbitrary code execution. A victim would need to open a malicious file to trigger these vulnerabilities.This vulnerability concerns the integer overflow when allocating the `vindex_offset` array.