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    2 vulnerabilities found for GraphicsMagick by GraphicsMagick Group

    CVE-2026-77118 (GCVE-0-2026-77118)

    Vulnerability from nvd – Published: 2026-08-20 12:42 – Updated: 2026-08-20 12:56
    VLAI
    Title
    Out-of-bounds write in GraphicsMagick PCD decoder
    Summary
    A heap out-of-bounds write exists in the Photo CD (PCD) decoder of GraphicsMagick. In DecodeImage() (coders/pcd.c), the Huffman delta loop advances its output pointer with q++ after every decoded delta and never checks it against the end of the heap-allocated luma/chroma plane buffers. The pointer is repositioned only when a sync marker introduces a new plane/row; between sync markers the run length is bounded solely by the input. A crafted PCD file that positions the pointer near the end of a plane and then supplies a long run of deltas with no intervening sync therefore walks the pointer past the end of the allocation and writes through it. Processing an untrusted PCD file — for example with gm convert or gm identify, or through any application linked against libGraphicsMagick — can corrupt heap memory beyond the buffers.
    Severity
    8.4 (High)
    CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    GraphicsMagick Group GraphicsMagick Affected: 1.0.0 , < 1.3.48 (semver)
        cpe:2.3:a:graphicsmagick:graphicsmagick:*:*:*:*:*:*:*:*
    		Create a notification for this product.
    Debian graphicsmagick Affected: 0 , < 1.4+really1.3.48-1 (deb)
        cpe:2.3:o:debian:debian_linux:11:*:*:*:*:*:*:*
        cpe:2.3:o:debian:debian_linux:12:*:*:*:*:*:*:*
        cpe:2.3:o:debian:debian_linux:13:*:*:*:*:*:*:*
    		Create a notification for this product.
    Fedora Project GraphicsMagick Affected: 0 , < 1.3.48 (rpm)
        cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:8.0:*:*:*:*:*:*:*
        cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:9.0:*:*:*:*:*:*:*
    		Create a notification for this product.
    Date Public
    2026-08-20 09:43
    Credits
    Cipher - Causal Security (https://causalsecurity.com/), who discovered the defect and reported it to the GraphicsMagick maintainer on 2026-06-14 Bob Friesenhahn, GraphicsMagick, for the upstream fix
    Show details on NVD website
    To clipboard 

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    CVE-2026-77118 (GCVE-0-2026-77118)

    Vulnerability from cvelistv5 – Published: 2026-08-20 12:42 – Updated: 2026-08-20 12:56
    VLAI
    Title
    Out-of-bounds write in GraphicsMagick PCD decoder
    Summary
    A heap out-of-bounds write exists in the Photo CD (PCD) decoder of GraphicsMagick. In DecodeImage() (coders/pcd.c), the Huffman delta loop advances its output pointer with q++ after every decoded delta and never checks it against the end of the heap-allocated luma/chroma plane buffers. The pointer is repositioned only when a sync marker introduces a new plane/row; between sync markers the run length is bounded solely by the input. A crafted PCD file that positions the pointer near the end of a plane and then supplies a long run of deltas with no intervening sync therefore walks the pointer past the end of the allocation and writes through it. Processing an untrusted PCD file — for example with gm convert or gm identify, or through any application linked against libGraphicsMagick — can corrupt heap memory beyond the buffers.
    Severity
    8.4 (High)
    CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    GraphicsMagick Group GraphicsMagick Affected: 1.0.0 , < 1.3.48 (semver)
        cpe:2.3:a:graphicsmagick:graphicsmagick:*:*:*:*:*:*:*:*
    		Create a notification for this product.
    Debian graphicsmagick Affected: 0 , < 1.4+really1.3.48-1 (deb)
        cpe:2.3:o:debian:debian_linux:11:*:*:*:*:*:*:*
        cpe:2.3:o:debian:debian_linux:12:*:*:*:*:*:*:*
        cpe:2.3:o:debian:debian_linux:13:*:*:*:*:*:*:*
    		Create a notification for this product.
    Fedora Project GraphicsMagick Affected: 0 , < 1.3.48 (rpm)
        cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:8.0:*:*:*:*:*:*:*
        cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:9.0:*:*:*:*:*:*:*
    		Create a notification for this product.
    Date Public
    2026-08-20 09:43
    Credits
    Cipher - Causal Security (https://causalsecurity.com/), who discovered the defect and reported it to the GraphicsMagick maintainer on 2026-06-14 Bob Friesenhahn, GraphicsMagick, for the upstream fix
    Show details on NVD website
    To clipboard 

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              "value": "\u003cp\u003eUpgrade to GraphicsMagick 1.3.48 or later, which bounds the decode output pointer against the end of each plane buffer and over-provisions the buffers.\u003c/p\u003e"
            }
          ],
          "value": "Upgrade to GraphicsMagick 1.3.48 or later, which bounds the decode output pointer against the end of each plane buffer and over-provisions the buffers."
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Out-of-bounds write in GraphicsMagick PCD decoder",
      "workarounds": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eWhere upgrading is not possible, prevent the PCD and PCDS coders from being used on untrusted input. GraphicsMagick detects PCD by file content, so filtering on filename extension is not sufficient; the coder module must be removed or the format rejected before decoding.\u003c/p\u003e"
            }
          ],
          "value": "Where upgrading is not possible, prevent the PCD and PCDS coders from being used on untrusted input. GraphicsMagick detects PCD by file content, so filtering on filename extension is not sufficient; the coder module must be removed or the format rejected before decoding."
        }
      ],
      "x_generator": {
        "engine": "Vulnogram 1.0.4"
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  },
  "cveMetadata": {
    "assignerOrgId": "22e2d327-25fe-45d7-9f0c-dcd23b7108df",
    "assignerShortName": "seal",
    "cveId": "CVE-2026-77118",
    "datePublished": "2026-08-20T12:42:42.952Z",
    "dateReserved": "2026-08-20T12:40:51.495Z",
    "dateUpdated": "2026-08-20T12:56:01.246Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}