CVE-2023-35994 - CVE House

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Status published High CVE-2023-35994

Multiple improper array index validation vulnerabilities exist in the fstReaderIterBlocks2...

7.8 CVSS

Vulnerability Description

Multiple improper array index validation vulnerabilities exist in the fstReaderIterBlocks2 tdelta functionality of GTKWave 3.3.115. A specially crafted .fst file can lead to arbitrary code execution. A victim would need to open a malicious file to trigger these vulnerabilities.This vulnerability concerns the tdelta initialization part.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

Discovered by Claudio Bozzato of Cisco Talos.

References

More from GTKWave

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Multiple out-of-bounds write vulnerabilities exist in the LXT2 parsing functionality...

Multiple out-of-bounds write vulnerabilities exist in the LXT2 parsing functionality...

Multiple integer underflow vulnerabilities exist in the LXT2 lxt2_rd_iter_radix shift...

Multiple integer underflow vulnerabilities exist in the LXT2 lxt2_rd_iter_radix shift...

Multiple integer overflow vulnerabilities exist in the LXT2 num_dict_entries functionality...

Affected Vendor

GTKWave

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Affected Software

GTKWave

Vulnerable Versions:

3.3.115

Timeline

Official Publish: January 8th, 2024

Last Modified: November 4th, 2025

Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1203 Exploitation for Client Execution

T1068 Exploitation for Privilege Escalation

Privilege Escalation

T1005 Data from Local System

T1485 Data Destruction