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    4 vulnerabilities by zchunk

    CVE-2026-117556 (GCVE-0-2026-117556)

    Vulnerability from nvd – Published: 2026-10-27 13:07 – Updated: 2026-10-28 16:17
    VLAI
    Title
    zchunk before 1.5.5 Heap Out-of-Bounds Read via read_preface()
    Summary
    zchunk before 1.5.5 contains a heap out-of-bounds read vulnerability in read_preface() in src/lib/header.c that passes the total header length instead of remaining bytes to compint parsing functions. Attackers can supply a crafted .zck file whose header ends inside a compressed integer, causing reads past the heap header buffer and crashing the application.
    Severity
    5.3 (Medium)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
    4.3 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-28 15:54 UTC
    CWE
    Assigner
    VulnCheck CNA under the mitre root
    CNA scorecard B 84/100 over 7150 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    zchunk zchunk Affected: 0 , < 1.5.5 (semver)
        cpe:2.3:a:zchunk:zchunk:*:*:*:*:*:*:*:*
    		Create a notification for this product.
    Date Public
    2026-10-22 00:00
    Credits
    HaiND from the Post and Telecommunication Institute of Technology
    Show details on NVD website
    To clipboard 

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    CVE-2023-46228 (GCVE-0-2023-46228)

    Vulnerability from nvd – Published: 2023-10-19 00:00 – Updated: 2024-09-12 18:08
    VLAI
    Summary
    zchunk before 1.3.2 has multiple integer overflows via malformed zchunk files to lib/comp/comp.c, lib/comp/zstd/zstd.c, lib/dl/multipart.c, or lib/header.c.
    Severity
    No CVSS data available.
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2024-09-12 18:07 UTC
    CWE
    • n/a
    Assigner
    mitre CNA under the mitre root
    CNA scorecard E 28/100 over 2329 records in the last 180 days details
    References
    Show details on NVD website
    To clipboard 

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    CVE-2026-117556 (GCVE-0-2026-117556)

    Vulnerability from cvelistv5 – Published: 2026-10-27 13:07 – Updated: 2026-10-28 16:17
    VLAI
    Title
    zchunk before 1.5.5 Heap Out-of-Bounds Read via read_preface()
    Summary
    zchunk before 1.5.5 contains a heap out-of-bounds read vulnerability in read_preface() in src/lib/header.c that passes the total header length instead of remaining bytes to compint parsing functions. Attackers can supply a crafted .zck file whose header ends inside a compressed integer, causing reads past the heap header buffer and crashing the application.
    Severity
    5.3 (Medium)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
    4.3 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-28 15:54 UTC
    CWE
    Assigner
    VulnCheck CNA under the mitre root
    CNA scorecard B 84/100 over 7150 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    zchunk zchunk Affected: 0 , < 1.5.5 (semver)
        cpe:2.3:a:zchunk:zchunk:*:*:*:*:*:*:*:*
    		Create a notification for this product.
    Date Public
    2026-10-22 00:00
    Credits
    HaiND from the Post and Telecommunication Institute of Technology
    Show details on NVD website
    To clipboard 

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    CVE-2023-46228 (GCVE-0-2023-46228)

    Vulnerability from cvelistv5 – Published: 2023-10-19 00:00 – Updated: 2024-09-12 18:08
    VLAI
    Summary
    zchunk before 1.3.2 has multiple integer overflows via malformed zchunk files to lib/comp/comp.c, lib/comp/zstd/zstd.c, lib/dl/multipart.c, or lib/header.c.
    Severity
    No CVSS data available.
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2024-09-12 18:07 UTC
    CWE
    • n/a
    Assigner
    mitre CNA under the mitre root
    CNA scorecard E 28/100 over 2329 records in the last 180 days details
    References
    Show details on NVD website
    To clipboard 

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          "url": "https://github.com/zchunk/zchunk/commit/08aec2b4dfd7f709b6e3d511411ffcc83ed4efbe"
        },
        {
          "url": "https://bugzilla.suse.com/show_bug.cgi?id=1216268"
        },
        {
          "url": "https://github.com/zchunk/zchunk/compare/1.3.1...1.3.2"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2023-46228",
    "datePublished": "2023-10-19T00:00:00.000Z",
    "dateReserved": "2023-10-19T00:00:00.000Z",
    "dateUpdated": "2024-09-12T18:08:06.106Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}