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CVE-2026-31631

Estado: AnalizadaAlta (8.2)—

In the Linux kernel, the following vulnerability has been resolved:

rxrpc: Fix buffer overread in rxgk_do_verify_authenticator()

Fix rxgk_do_verify_authenticator() to check the buffer size before checking the nonce.

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.

Vector CVSS de red sin autenticación (AV:N/PR:N) indica T1190. CWE-787 (buffer overread) en componente de red remota permite DoS por lectura de búfer y potencial fuga de datos de memoria.

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

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
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          "programFiles": [
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  "published": "2026-04-24T15:16:42.423",
  "references": [
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      "url": "https://git.kernel.org/stable/c/1c4422d8be81718ecb15d79aedff607323085201",
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      "source": "nvd@nist.gov",
      "description": [
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          "value": "CWE-787"
        }
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    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix buffer overread in rxgk_do_verify_authenticator()\n\nFix rxgk_do_verify_authenticator() to check the buffer size before checking\nthe nonce."
    }
  ],
  "lastModified": "2026-06-17T10:34:07.717",
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