{
  "cveId": "CVE-2025-50343",
  "url": "https://patchblox.com/security/cve/CVE-2025-50343",
  "summary": "CVE-2025-50343 is fixed in libmatio on 1 platform, first by DEBIAN-CVE-2025-50343, released December 30, 2025. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "libmatio: An issue was discovered in matio 1.5.28",
  "description": "An issue was discovered in matio 1.5.28. A heap-based memory corruption can occur in Mat_VarCreateStruct() when the nfields value does not match the actual number of strings in the fields array. This leads to out-of-bounds reads and invalid memory frees during cleanup, potentially causing a segmentation fault or heap corruption. NOTE: Multiple third-parties note that the available evidence does not demonstrate a vulnerability exploitable through an attacker-controlled input path.",
  "published": "2025-12-30T20:16:00Z",
  "severity": "critical",
  "cvss": 9.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libmatio",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "1.5.23-2\u002Bdeb12u1",
      "fix": "DEBIAN-CVE-2025-50343",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-50343",
      "released": "2025-12-30T20:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libmatio",
      "release": "Debian 14",
      "fixedVersion": "1.5.30-2",
      "fix": "DEBIAN-CVE-2025-50343",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-50343",
      "released": "2025-12-30T20:16:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}