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CVE-2023-5215

Estado: ModificadaMedia (6.5)—

A flaw was found in libnbd. A server can reply with a block size larger than 2^63 (the NBD spec states the size is a 64-bit unsigned value). This issue could lead to an application crash or other unintended behavior for NBD clients that doesn't treat the return value of the nbd_get_size() function correctly.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (2)

Redhat — Enterprise LinuxRedhat — Libnbd

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2023-5215",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "secalert@redhat.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.3,
          "attackVector": "ADJACENT_NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.6
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          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      }
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  "affected": [
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          "product": "Red Hat Enterprise Linux 9",
          "versions": [
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              "version": "0:1.18.1-3.el9",
              "lessThan": "*",
              "versionType": "rpm"
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          "packageName": "libnbd",
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
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          "defaultStatus": "affected"
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            "cpe:/a:redhat:advanced_virtualization:8::el8"
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          "vendor": "Red Hat",
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  ],
  "published": "2023-09-28T14:15:26.117",
  "references": [
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    {
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Secondary",
      "source": "secalert@redhat.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-241"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-252"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in libnbd. A server can reply with a block size larger than 2^63 (the NBD spec states the size is a 64-bit unsigned value). This issue could lead to an application crash or other unintended behavior for NBD clients that doesn't treat the return value of the nbd_get_size() function correctly."
    },
    {
      "lang": "es",
      "value": "Se encontró una falla en libnbd. Un servidor puede responder con un tamaño de bloque mayor que 2^63 (la especificación NBD establece que el tamaño es un valor sin signo de 64 bits). Este problema podría provocar un bloqueo de la aplicación u otro comportamiento no deseado para los clientes NBD que no traten correctamente el valor de retorno de la función nbd_get_size()."
    }
  ],
  "lastModified": "2026-06-17T06:48:06.327",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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