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CVE-2021-20239

Estado: ModificadaBaja (3.3)—

Se encontró un fallo en el kernel de Linux en versiones anteriores a 5.4.92 en el protocolo BPF. Este fallo permite a un atacante con una cuenta local filtrar información sobre las direcciones internas del kernel. La mayor amenaza de esta vulnerabilidad es la confidencialidad

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 (3)

Fedoraproject — FedoraLinux — Linux KernelRedhat — Enterprise Linux

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2021-20239",
  "cveTags": [],
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        "source": "nvd@nist.gov",
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          "baseScore": 2.1,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "LOW",
        "obtainAllPrivilege": false,
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          "privilegesRequired": "LOW",
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  "affected": [
    {
      "source": "secalert@redhat.com",
      "affectedData": [
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          "vendor": "n/a",
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          "versions": [
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              "version": "kernel 5.4.92"
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  "published": "2021-05-28T11:15:08.003",
  "references": [
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      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1923636",
      "tags": [
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        "Third Party Advisory"
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      "description": [
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          "value": "CWE-119"
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    }
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  "lastModified": "2026-06-17T03:33:31.780",
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