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CVE-2021-26334

Estado: ModificadaCrítica (9.9)—

The AMDPowerProfiler.sys driver of AMD μProf tool may allow lower privileged users to access MSRs in kernel which may lead to privilege escalation and ring-0 code execution by the lower privileged user.

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 (1)

AMD — AMD Uprof

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2021-26334",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 9,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C",
          "authentication": "SINGLE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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          "baseScore": 9.9,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
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        "impactScore": 6,
        "exploitabilityScore": 3.1
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  "affected": [
    {
      "source": "psirt@amd.com",
      "affectedData": [
        {
          "vendor": "AMD",
          "product": "μProf Tool",
          "versions": [
            {
              "status": "affected",
              "version": "μProf Tool",
              "lessThan": "3.4.494",
              "versionType": "custom"
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  "published": "2021-12-01T16:15:07.590",
  "references": [
    {
      "url": "https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1016",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "source": "psirt@amd.com"
    },
    {
      "url": "https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1016",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Secondary",
      "source": "psirt@amd.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-284"
        }
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    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
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    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The AMDPowerProfiler.sys driver of AMD μProf tool may allow lower privileged users to access MSRs in kernel which may lead to privilege escalation and ring-0 code execution by the lower privileged user."
    },
    {
      "lang": "es",
      "value": "El controlador AMDPowerProfiler.sys de la herramienta AMD ?Prof puede permitir a los usuarios con menos privilegios acceder a los MSR en el kernel, lo que puede llevar a una escalada de privilegios y a la ejecución de código ring-0 por parte del usuario con menos privilegios"
    }
  ],
  "lastModified": "2026-06-17T03:43:08.697",
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