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CVE-2026-5260

Estado: Pendiente de análisisAlta (8.2)—

A flaw was found in libgnutls. A remote attacker, by sending an extremely short premaster secret during an RSA key exchange to a server using an RSA key backed by a PKCS#11 token, could trigger a short heap overread. This memory corruption vulnerability could lead to information disclosure.

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.

Vulnerabilidad de lectura de memoria (heap overread) en protocolo de red sin autenticación (AV:N/PR:N). AV:N sin UI:R ni PR indica T1190. El impacto es disclosure de información en memoria local del servidor.

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

Tecnologías afectadas (1)

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

CWE

Referencias

JSON original (NVD)

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  "published": "2026-05-26T22:16:44.170",
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      "url": "https://access.redhat.com/errata/RHSA-2026:13274",
      "source": "secalert@redhat.com"
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      "url": "https://access.redhat.com/errata/RHSA-2026:20611",
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    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:20612",
      "source": "secalert@redhat.com"
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    {
      "url": "https://access.redhat.com/errata/RHSA-2026:20613",
      "source": "secalert@redhat.com"
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    {
      "url": "https://access.redhat.com/errata/RHSA-2026:26319",
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    {
      "url": "https://access.redhat.com/errata/RHSA-2026:26409",
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    {
      "url": "https://access.redhat.com/errata/RHSA-2026:29197",
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      "url": "https://access.redhat.com/errata/RHSA-2026:30004",
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      "url": "https://access.redhat.com/errata/RHSA-2026:32962",
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      "url": "https://access.redhat.com/errata/RHSA-2026:33125",
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      "url": "https://access.redhat.com/errata/RHSA-2026:40762",
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      "url": "https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-10",
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      "description": [
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          "lang": "en",
          "value": "CWE-126"
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      "lang": "en",
      "value": "A flaw was found in libgnutls. A remote attacker, by sending an extremely short premaster secret during an RSA key exchange to a server using an RSA key backed by a PKCS#11 token, could trigger a short heap overread. This memory corruption vulnerability could lead to information disclosure."
    },
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    }
  ],
  "lastModified": "2026-10-02T03:16:50.190",
  "sourceIdentifier": "secalert@redhat.com"
}