{
  "cveId": "CVE-2025-55780",
  "url": "https://patchblox.com/security/cve/CVE-2025-55780",
  "summary": "CVE-2025-55780 is fixed in mupdf on 1 platform, first by DEBIAN-CVE-2025-55780, released September 23, 2025. It is not reported as exploited. Patch Radar priority: High.",
  "title": "mupdf: A null pointer dereference occurs in the function break_word_for_overflow_wrap() in MuPDF 1.26.4 when rendering a mal...",
  "description": "A null pointer dereference occurs in the function break_word_for_overflow_wrap() in MuPDF 1.26.4 when rendering a malformed EPUB document. Specifically, the function calls fz_html_split_flow() to split a FLOW_WORD node, but does not check if node-\u003Enext is valid before accessing node-\u003Enext-\u003Eoverflow_wrap, resulting in a crash if the split fails or returns a partial node chain.",
  "published": "2025-09-23T18:15:34Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00428,
  "epssPercentile": 0.37256,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "mupdf",
      "release": "Debian 14",
      "fixedVersion": "1.27.0\u002Bds1-2",
      "fix": "DEBIAN-CVE-2025-55780",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-55780",
      "released": "2025-09-23T18:15:34Z"
    },
    {
      "platform": "linux",
      "product": "mupdf",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "1.27.2-bp160.1.1",
      "fix": "OPENSUSE-SU-2026:21180-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21180-1",
      "released": "2026-06-30T11:34:14Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}