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CVE-2021-3700

Estado: ModificadaMedia (6.4)—

A use-after-free vulnerability was found in usbredir in versions prior to 0.11.0 in the usbredirparser_serialize() in usbredirparser/usbredirparser.c. This issue occurs when serializing large amounts of buffered write data in the case of a slow or blocked destination.

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 (4)

Debian — Debian LinuxFedoraproject — FedoraRedhat — Enterprise LinuxSpice-space — Usbredir

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2021-3700",
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          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
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        "impactScore": 6.4,
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          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
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          "userInteraction": "NONE",
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        "impactScore": 5.9,
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  "affected": [
    {
      "source": "secalert@redhat.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "usbredir",
          "versions": [
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              "status": "affected",
              "version": "usbredir 0.11.0"
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  "published": "2022-02-24T19:15:09.260",
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "secalert@redhat.com",
      "description": [
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          "lang": "en",
          "value": "CWE-416"
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      ]
    },
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      "description": [
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          "value": "CWE-416"
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      "lang": "en",
      "value": "A use-after-free vulnerability was found in usbredir in versions prior to 0.11.0 in the usbredirparser_serialize() in usbredirparser/usbredirparser.c. This issue occurs when serializing large amounts of buffered write data in the case of a slow or blocked destination."
    },
    {
      "lang": "es",
      "value": "Se ha encontrado una vulnerabilidad de uso de memoria previamente liberada en usbredir en versiones anteriores a 0.11.0, en la función  usbredirparser_serialize() en el archivo usbredirparser/usbredirparser.c. Este problema es producido cuando son serializados grandes cantidades de datos de escritura en búfer en el caso de un destino lento o bloqueado"
    }
  ],
  "lastModified": "2026-06-17T04:05:35.120",
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