CVE-2025-55095

{
  "id": "CVE-2025-55095",
  "sourceIdentifier": "[email protected]",
  "published": "2026-01-27T16:16:14.930",
  "lastModified": "2026-11-05T19:27:30.690",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The function _ux_host_class_storage_media_mount() is responsible for mounting partitions on a USB mass storage device. When it encounters an extended partition entry in the partition table, it recursively calls itself to mount the next logical partition.\n\nThis recursion occurs in _ux_host_class_storage_partition_read(), which parses up to four partition entries. If an extended partition is found (with type UX_HOST_CLASS_STORAGE_PARTITION_EXTENDED or EXTENDED_LBA_MAPPED), the code invokes:\n            _ux_host_class_storage_media_mount(storage, sector + _ux_utility_long_get(...));\n\n\nThere is no limit on the recursion depth or tracking of visited sectors. As a result, a malicious or malformed disk image can include cyclic or excessively deep chains of extended partitions, causing the function to recurse until stack overflow occurs."
    },
    {
      "lang": "es",
      "value": "La función _ux_host_class_storage_media_mount() es responsable de montar particiones en un dispositivo de almacenamiento masivo USB. Cuando encuentra una entrada de partición extendida en la tabla de particiones, se llama a sí misma recursivamente para montar la siguiente partición lógica.\n\nEsta recursión ocurre en _ux_host_class_storage_partition_read(), que analiza hasta cuatro entradas de partición. Si se encuentra una partición extendida (con el tipo UX_HOST_CLASS_STORAGE_PARTITION_EXTENDED o EXTENDED_LBA_MAPPED), el código invoca:\n            _ux_host_class_storage_media_mount(storage, sector + _ux_utility_long_get(...));\n\nNo hay límite en la profundidad de recursión ni seguimiento de los sectores visitados. Como resultado, una imagen de disco maliciosa o malformada puede incluir cadenas cíclicas o excesivamente profundas de particiones extendidas, lo que hace que la función recurra hasta que ocurra un desbordamiento de pila."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Eclipse Foundation",
          "product": "Eclipse ThreadX - USBX",
          "defaultStatus": "unaffected",
          "repo": "https://github.com/eclipse-threadx/usbx",
          "versions": [
            {
              "version": "0",
              "lessThanOrEqual": "6.4.2",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L",
          "baseScore": 4.2,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "HIGH",
          "privilegesRequired": "LOW",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 0.8,
        "impactScore": 3.4
      },
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 7.0,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "HIGH",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-01-27T15:57:28.543629Z",
          "id": "CVE-2025-55095",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
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  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-121"
        },
        {
          "lang": "en",
          "value": "CWE-674"
        }
      ]
    },
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
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          "operator": "OR",
          "negate": false,
          "cpeMatch": [
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              "versionEndExcluding": "6.4.5.202504",
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  "references": [
    {
      "url": "https://github.com/eclipse-threadx/usbx/security/advisories/GHSA-qfmp-wch9-rpv2",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ]
    }
  ]
}