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CVE-2020-28941

Estado: ModificadaMedia (5.5)—

Se detectó un problema en el archivo drivers/accessibility/speakup/spk_ttyio.c en el kernel de Linux versiones hasta 5.9.9. Los atacantes locales en sistemas con el controlador speakup podrían causar un ataque local de denegación de servicio, también se conoce como CID-d41227544427. Esto ocurre debido a una liberación no válida cuando la disciplina de línea se usa más de una vez

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)

Debian — Debian LinuxFedoraproject — FedoraLinux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2020-28941",
  "cveTags": [],
  "metrics": {
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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          "id": "CVE-2020-28941",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-29T16:06:48.325637Z"
        }
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    ],
    "cvssMetricV2": [
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        "type": "Primary",
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          "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:C",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 6.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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    "cvssMetricV31": [
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
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          "integrityImpact": "NONE",
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          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
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          "confidentialityImpact": "NONE"
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  "affected": [
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      "affectedData": [
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          "versions": [
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  "published": "2020-11-19T19:15:11.797",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-763"
        }
      ]
    },
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
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          "lang": "en",
          "value": "CWE-763"
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  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in drivers/accessibility/speakup/spk_ttyio.c in the Linux kernel through 5.9.9. Local attackers on systems with the speakup driver could cause a local denial of service attack, aka CID-d41227544427. This occurs because of an invalid free when the line discipline is used more than once."
    },
    {
      "lang": "es",
      "value": "Se detectó un problema en el archivo drivers/accessibility/speakup/spk_ttyio.c en el kernel de Linux versiones hasta 5.9.9. Los atacantes locales en sistemas con el controlador speakup podrían causar un ataque local de denegación de servicio, también se conoce como CID-d41227544427. Esto ocurre debido a una liberación no válida cuando la disciplina de línea se usa más de una vez"
    }
  ],
  "lastModified": "2026-06-17T03:10:52.583",
  "configurations": [
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}