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CVE-2021-21775

Estado: ModificadaAlta (8)—

A use-after-free vulnerability exists in the way certain events are processed for ImageLoader objects of Webkit WebKitGTK 2.30.4. A specially crafted web page can lead to a potential information leak and further memory corruption. In order to trigger the vulnerability, a victim must be tricked into visiting a malicious webpage.

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 — FedoraWebkitgtk — Webkitgtk

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2021-21775",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:S/C:P/I:P/A:P",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 6.8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
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    "cvssMetricV30": [
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          "scope": "UNCHANGED",
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          "baseScore": 6.8,
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          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
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          "confidentialityImpact": "HIGH"
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        "impactScore": 5.9,
        "exploitabilityScore": 2.1
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  },
  "affected": [
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      "source": "talos-cna@cisco.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "Webkit",
          "versions": [
            {
              "status": "affected",
              "version": "Webkit WebKitGTK 2.30.4"
            }
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  "published": "2021-07-07T22:15:07.960",
  "references": [
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Secondary",
      "source": "talos-cna@cisco.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
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    },
    {
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      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "CWE-416"
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  ],
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    {
      "lang": "en",
      "value": "A use-after-free vulnerability exists in the way certain events are processed for ImageLoader objects of Webkit WebKitGTK 2.30.4. A specially crafted web page can lead to a potential information leak and further memory corruption. In order to trigger the vulnerability, a victim must be tricked into visiting a malicious webpage."
    },
    {
      "lang": "es",
      "value": "Se presenta una vulnerabilidad de uso de memoria previamente liberada en la forma en que se procesan determinados eventos para los objetos ImageLoader de Webkit WebKitGTK versión 2.30.4. Una página web especialmente diseñada puede conllevar a un potencial filtrado de información y una mayor corrupción de memoria. Para desencadenar la vulnerabilidad, una víctima debe ser engañada para visitar una página web maliciosa"
    }
  ],
  "lastModified": "2026-06-17T03:36:05.763",
  "configurations": [
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  "sourceIdentifier": "talos-cna@cisco.com"
}