CVE-2025-49179

Estado: AplazadaAlta (7.3)—
A flaw was found in the X Record extension. The RecordSanityCheckRegisterClients function does not check for an integer overflow when computing request length, which allows a client to bypass length checks.
CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H
Puntuación base: 7.3
Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.33%
Percentil entre todas las CVEs puntuadas: 24
Fecha de la puntuación: 6/10/2026
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.
ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation85 %
Impacto principalT1059 Command and Scripting Interpreterexecution75 %
Impacto secundarioT1005 Data from Local Systemcollection60 %
AV:L + PR:L sin UI sugiere escalada local. Integer overflow en validación de longitud permite bypass de controles, típico de T1068. La ejecución de código (T1059) y lectura de memoria (T1005) son posibles consecuencias del overflow, ambas mencionadas implícitamente en CWE-190.
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

Execution Prevention Threat Intelligence Program Restrict Web-Based Content Privileged Account Management Limit Software Installation Behavior Prevention on Endpoint
CWE

CWE-190
Referencias

JSON original (NVD)

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          "vendor": "Red Hat",
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  ],
  "published": "2025-06-17T15:15:46.000",
  "references": [
    {
      "url": "https://access.redhat.com/errata/RHSA-2025:10258",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2025:10342",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2025:10343",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2025:10344",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2025:10346",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2025:10347",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2025:10348",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2025:10349",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2025:10350",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2025:10351",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2025:10352",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2025:10355",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2025:10356",
      "source": "secalert@redhat.com"
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      "url": "https://access.redhat.com/errata/RHSA-2025:10360",
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      "source": "secalert@redhat.com"
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      "url": "https://access.redhat.com/errata/RHSA-2025:10376",
      "source": "secalert@redhat.com"
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      "source": "secalert@redhat.com"
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    {
      "url": "https://access.redhat.com/errata/RHSA-2025:9304",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2025:9305",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2025:9306",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2025:9392",
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      "url": "https://access.redhat.com/errata/RHSA-2025:9964",
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      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2369978",
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      "url": "https://gitlab.freedesktop.org/xorg/xserver/-/commit/2bde9ca49a8fd9a1e6697d5e7ef837870d66f5d4",
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    },
    {
      "url": "https://www.x.org/wiki/Development/Security/",
      "source": "secalert@redhat.com"
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    {
      "url": "https://lists.debian.org/debian-lts-announce/2025/06/msg00028.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "weaknesses": [
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      "source": "secalert@redhat.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-190"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in the X Record extension. The RecordSanityCheckRegisterClients function does not check for an integer overflow when computing request length, which allows a client to bypass length checks."
    },
    {
      "lang": "es",
      "value": "Se encontró una falla en la extensión X Record. La función RecordSanityCheckRegisterClients no verifica si hay un desbordamiento de enteros al calcular la longitud de la solicitud, lo que permite que un cliente omita las verificaciones de longitud."
    }
  ],
  "lastModified": "2026-06-30T11:16:20.763",
  "sourceIdentifier": "secalert@redhat.com"
}