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CVE-2021-26383

Estado: AplazadaAlta (7.9)—

Insufficient bounds checking in AMD TEE (Trusted Execution Environment) could allow an attacker with a compromised userspace to invoke a command with malformed arguments leading to out of bounds memory access, potentially resulting in loss of integrity or availability.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

AV:L (acceso local) con PR:H sin interacción del usuario indica escalada de privilegios (T1068). El desbordamiento de búfer (CWE-787) en TEE permite ejecución de código y corrupción de memoria, afectando integridad y disponibilidad.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Threat Intelligence ProgramRestrict File and Directory PermissionsRemote Data StorageNetwork SegmentationExecution PreventionEncrypt Sensitive Information

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

AMD — TEEAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2021-26383",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-26383",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-09-08T13:49:47.320770Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "psirt@amd.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 7.9,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 5.8,
        "exploitabilityScore": 1.5
      }
    ]
  },
  "affected": [
    {
      "source": "psirt@amd.com",
      "affectedData": [
        {
          "vendor": "AMD",
          "product": "AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics",
          "versions": [
            {
              "status": "unaffected",
              "version": "CezannePI-FP6 1.0.0.6"
            }
          ],
          "defaultStatus": "affected"
        },
        {
          "vendor": "AMD",
          "product": "AMD Ryzen™ 4000 Series Desktop Processors",
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            }
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        },
        {
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          "product": "AMD Ryzen™ 7030 Series Mobile Processors with Radeon™ Graphics",
          "versions": [
            {
              "status": "unaffected",
              "version": "CezannePI-FP6 1.0.0.6"
            }
          ],
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        },
        {
          "vendor": "AMD",
          "product": "AMD Ryzen™ 5000 Series Desktop Processors with Radeon™ Graphics",
          "versions": [
            {
              "status": "unaffected",
              "version": "ComboAM4v2 PI 1.2.0.5"
            }
          ],
          "defaultStatus": "affected"
        },
        {
          "vendor": "AMD",
          "product": "AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics",
          "versions": [
            {
              "status": "unaffected",
              "version": "RenoirPI-FP6 1.0.0.7"
            }
          ],
          "defaultStatus": "affected"
        },
        {
          "vendor": "AMD",
          "product": "AMD Ryzen™ Embedded V2000 Series Processors",
          "versions": [
            {
              "status": "unaffected",
              "version": "EmbeddedPI-FP6_1.0.0.6"
            }
          ],
          "defaultStatus": "affected"
        },
        {
          "vendor": "AMD",
          "product": "AMD Radeon™ RX 5000 Series Graphics Products",
          "versions": [
            {
              "status": "unaffected",
              "version": "AMD Software: Adrenalin Edition 23.2.1 (22.40.01.45)"
            }
          ],
          "defaultStatus": "affected"
        },
        {
          "vendor": "AMD",
          "product": "AMD Radeon™ RX 6000 Series Graphics Products",
          "versions": [
            {
              "status": "unaffected",
              "version": "AMD Software: Adrenalin Edition 23.2.1 (22.40.01.45)"
            }
          ],
          "defaultStatus": "affected"
        },
        {
          "vendor": "AMD",
          "product": "AMD Radeon™ PRO W5000 Series Graphics Products",
          "versions": [
            {
              "status": "unaffected",
              "version": "AMD Software: PRO Edition 23.Q1 (22.40.37.05)"
            }
          ],
          "defaultStatus": "affected"
        },
        {
          "vendor": "AMD",
          "product": "AMD Radeon™ PRO W6000 Series Graphics Products",
          "versions": [
            {
              "status": "unaffected",
              "version": "AMD Software: PRO Edition 23.Q1 (22.40.37.05)"
            }
          ],
          "defaultStatus": "affected"
        },
        {
          "vendor": "AMD",
          "product": "AMD Instinct™ MI210",
          "versions": [
            {
              "status": "unaffected",
              "version": "ROCm 6.4"
            }
          ],
          "defaultStatus": "affected"
        },
        {
          "vendor": "AMD",
          "product": "AMD Instinct™ MI250",
          "versions": [
            {
              "status": "unaffected",
              "version": "ROCm 6.4"
            }
          ],
          "defaultStatus": "affected"
        },
        {
          "vendor": "AMD",
          "product": "AMD Radeon™ PRO V520 Graphics Products",
          "versions": [
            {
              "status": "unaffected",
              "version": "Contact your AMD Customer Engineering representative"
            }
          ],
          "defaultStatus": "affected"
        },
        {
          "vendor": "AMD",
          "product": "AMD Radeon™ PRO V620 Graphics Products",
          "versions": [
            {
              "status": "unaffected",
              "version": "Contact your AMD Customer Engineering representative"
            }
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-09-06T00:15:33.930",
  "references": [
    {
      "url": "https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-4012.html",
      "source": "psirt@amd.com"
    },
    {
      "url": "https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-5007.html",
      "source": "psirt@amd.com"
    },
    {
      "url": "https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-6018.html",
      "source": "psirt@amd.com"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "psirt@amd.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Insufficient bounds checking in AMD TEE (Trusted Execution Environment) could allow an attacker with a compromised userspace to invoke a command with malformed arguments leading to out of bounds memory access, potentially resulting in loss of integrity or availability."
    }
  ],
  "lastModified": "2026-06-17T03:43:17.503",
  "sourceIdentifier": "psirt@amd.com"
}