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CVE-2021-33834

Estado: ModificadaAlta (7.1)—

An issue was discovered in iscflashx64.sys 3.9.3.0 in Insyde H2OFFT 6.20.00. When handling IOCTL 0x22229a, the input used to allocate a buffer and copy memory is mishandled. This could cause memory corruption or a system crash.

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)

Insyde — H2offtInsyde — Iscflashx64.sys

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2021-33834",
  "cveTags": [],
  "metrics": {
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        "ssvcData": {
          "id": "CVE-2021-33834",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-09-26T18:43:33.140037Z"
        }
      }
    ],
    "cvssMetricV31": [
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        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
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          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 1.8
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  "affected": [
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      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
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              "version": "n/a"
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  ],
  "published": "2023-09-08T02:15:07.503",
  "references": [
    {
      "url": "https://www.insyde.com/security-pledge",
      "tags": [
        "Not Applicable"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://www.insyde.com/security-pledge/SA-2021004",
      "tags": [
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      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://www.insyde.com/security-pledge",
      "tags": [
        "Not Applicable"
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    },
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      "url": "https://www.insyde.com/security-pledge/SA-2021004",
      "tags": [
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
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          "value": "CWE-787"
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      ]
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in iscflashx64.sys 3.9.3.0 in Insyde H2OFFT 6.20.00. When handling IOCTL 0x22229a, the input used to allocate a buffer and copy memory is mishandled. This could cause memory corruption or a system crash."
    },
    {
      "lang": "es",
      "value": "Se descubrió un problema en iscflashx64.sys 3.9.3.0 en Insyde H2OFFT 6.20.00. Cuando se gestiona IOCTL 0x22229a, la entrada utilizada para asignar el búfer y copiar memoria se maneja incorrectamente. Esto podría causar daños en la memoria o un bloqueo del sistema."
    }
  ],
  "lastModified": "2026-06-17T03:55:17.260",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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  "sourceIdentifier": "cve@mitre.org"
}