Security advisory

{
  "id": "1261a677f5851a32d5cdef477b14b4e548e3d716b3fa074f66707ce5fa4b4654",
  "url": "https://osv.dev/vulnerability/CVE-2017-7856",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2017-7856",
    "summary": "LibreOffice before 2017-03-11 has an out-of-bounds write caused by a heap-based buffer overflow in the SVMConverter::ImplConvertFromSVM1 function in vcl/source/gdi/svmconverter.cxx.",
    "evidence": "osv:CVE-2017-7856",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2017-7856",
      "aliases": [
        "CVE-2017-7856"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/libreoffice/core",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "e37e437cb0cfa0eab9d2e98a23f5074ae118d3df"
                },
                {
                  "fixed": "28e61b634353110445e334ccaa415d7fb6629d62"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:libreoffice:libreoffice:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "5.2.6.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "28e61b634353110445e334ccaa415d7fb6629d62"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "libreoffice-5.2.6.1",
            "libreoffice-5-3-branch-point",
            "libreoffice-5-2-branch-point",
            "libreoffice-5-1-branch-point",
            "libreoffice-5-0-branch-point",
            "libreoffice-4-4-branch-point",
            "libreoffice-4-3-branch-point",
            "sdremote-2.0.0",
            "libreoffice-4-2-branch-point",
            "libreoffice-4-2-milestone-1",
            "libreoffice-4-1-branch-point",
            "libreoffice-4-0-branch-point",
            "libreoffice-3-6-branch-point",
            "libreoffice-3.5.0.0",
            "libreoffice-3-5-branch-point",
            "windows_build_successful_2011_11_08",
            "MELD_LIBREOFFICE_REPOS"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-7856.json",
            "vanir_signatures": [
              {
                "id": "CVE-2017-7856-4acdecd9",
                "digest": {
                  "length": 18329,
                  "function_hash": "298204384063460422800894264659505851315"
                },
                "source": "https://github.com/libreoffice/core/commit/28e61b634353110445e334ccaa415d7fb6629d62",
                "target": {
                  "file": "vcl/source/gdi/svmconverter.cxx",
                  "function": "SVMConverter::ImplConvertFromSVM1"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2017-7856-caaf43c2",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "56997574373070255410130733878905353393",
                    "201536209379238536522222923938150462503",
                    "221828152900981007123820303299634245832",
                    "86529089122140294639030571344540798397"
                  ]
                },
                "source": "https://github.com/libreoffice/core/commit/28e61b634353110445e334ccaa415d7fb6629d62",
                "target": {
                  "file": "vcl/source/gdi/svmconverter.cxx"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T13:24:23Z"
          }
        }
      ],
      "modified": "2026-10-20T13:24:23.694084526Z",
      "provider": "osv",
      "references": [
        "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=817",
        "https://github.com/LibreOffice/core/commit/28e61b634353110445e334ccaa415d7fb6629d62"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2017-7856",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 387634,
  "published_at": "2017-04-14T04:59:00.227+00:00"
}