osv-2026-727
Vulnerability from osv_ossfuzz
Published
2026-05-14 00:05
Modified
2026-05-14 00:05
Summary
Global-buffer-overflow in md_start_new_block
Details

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=512429152

Crash type: Global-buffer-overflow READ 4
Crash state:
md_start_new_block
md_parse
md_html
References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "fixed_range": "4f0b252c8e8952d53156949777ebfe3f9355def3:5f9b246fd01e90afa8075c1b6c2904ea44375fe3",
        "introduced_range": "07712a59a4cdb66170d608125ce3a191ffa3d4c7:345666722d965072c2c94bbb08b2ae91385c1592"
      },
      "ecosystem_specific": {
        "severity": null
      },
      "package": {
        "ecosystem": "OSS-Fuzz",
        "name": "md4c",
        "purl": "pkg:generic/md4c"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "ed89abed05845225cdfe2c94a49ec13a37b7578f"
            },
            {
              "fixed": "5f9b246fd01e90afa8075c1b6c2904ea44375fe3"
            }
          ],
          "repo": "https://github.com/mity/md4c",
          "type": "GIT"
        }
      ],
      "versions": []
    }
  ],
  "details": "OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=512429152\n\n```\nCrash type: Global-buffer-overflow READ 4\nCrash state:\nmd_start_new_block\nmd_parse\nmd_html\n```\n",
  "id": "OSV-2026-727",
  "modified": "2026-05-14T00:05:08.265818Z",
  "published": "2026-05-14T00:05:08.265509Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=512429152"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "Global-buffer-overflow in md_start_new_block"
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.