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    CVE-2023-36746

    Multiple heap-based buffer overflow vulnerabilities exist in the fstReaderIterBlocks2 fstWritex len functionality of GTKWave 3.3.115. A specially crafted .fst file can lead to memory corruption. A victim would need to open a malicious file to trigger these vulnerabilities.This vulnerability concerns the handling of `len` in `fstWritex` when parsing the time table.

    Published:Jan 8, 2024
    Last Modified:Nov 4, 2025
    EPS:Jan 8, 2024
    EPSS Score:0.0004
    CVSS Score:7

    Affected Products

    Vendor
    Tonybybell
    Product
    Gtkwave

    Exploits

    https://talosintelligence.com/vulnerability_reports/TALOS-2023-1793https://talosintelligence.com/vulnerability_reports/TALOS-2023-1793

    Related CVEs

    CVE-2023-32650 (CVSS 7) — An integer overflow vulnerability exists in the FST_BL_GEOM parsing maxhandle functionality of GTKWave 3.3.115…
    CVE-2023-35704 (CVSS 7.8) — Multiple stack-based buffer overflow vulnerabilities exist in the FST LEB128 varint functionality of GTKWave 3…
    CVE-2023-35703 (CVSS 7.8) — Multiple stack-based buffer overflow vulnerabilities exist in the FST LEB128 varint functionality of GTKWave 3…
    CVE-2023-35702 (CVSS 7.8) — Multiple stack-based buffer overflow vulnerabilities exist in the FST LEB128 varint functionality of GTKWave 3…
    CVE-2023-35958 (CVSS 7.8) — Multiple heap-based buffer overflow vulnerabilities exist in the fstReaderIterBlocks2 VCDATA parsing functiona…
    CVE-2023-35957 (CVSS 7.8) — Multiple heap-based buffer overflow vulnerabilities exist in the fstReaderIterBlocks2 VCDATA parsing functiona…
    CVE-2023-35956 (CVSS 7.8) — Multiple heap-based buffer overflow vulnerabilities exist in the fstReaderIterBlocks2 VCDATA parsing functiona…
    CVE-2023-35955 (CVSS 7.8) — Multiple heap-based buffer overflow vulnerabilities exist in the fstReaderIterBlocks2 VCDATA parsing functiona…
    CVE-2023-35964 (CVSS 7.8) — Multiple OS command injection vulnerabilities exist in the decompression functionality of GTKWave 3.3.115. A s…
    CVE-2023-35963 (CVSS 7.8) — Multiple OS command injection vulnerabilities exist in the decompression functionality of GTKWave 3.3.115. A s…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
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    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High