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CVE-2025-38133

Estado: ModificadaAlta (7.8)—

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

iio: adc: ad4851: fix ad4858 chan pointer handling

The pointer returned from ad4851_parse_channels_common() is incremented internally as each channel is populated. In ad4858_parse_channels(), the same pointer was further incremented while setting ext_scan_type fields for each channel. This resulted in indio_dev->channels being set to a pointer past the end of the allocated array, potentially causing memory corruption or undefined behavior.

Fix this by iterating over the channels using an explicit index instead of incrementing the pointer. This preserves the original base pointer and ensures all channel metadata is set correctly.

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 local (AV:L) sin interacción de usuario en kernel Linux con acceso de privilegios limitados (PR:L) y consecuencias de confidencialidad, integridad y disponibilidad altas. El desbordamiento de búfer (CWE-787) en manejo de punteros permite escalada de privilegios local. La corrupción de

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 PreventionThreat Intelligence ProgramRestrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationBehavior Prevention on Endpoint

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2025-38133",
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        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          "version": "3.1",
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  "published": "2025-07-03T09:15:27.697",
  "references": [
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      "url": "https://git.kernel.org/stable/c/499a8cee812588905cc940837e69918c1649a19e",
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      "description": [
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          "value": "CWE-787"
        }
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: adc: ad4851: fix ad4858 chan pointer handling\n\nThe pointer returned from ad4851_parse_channels_common() is incremented\ninternally as each channel is populated. In ad4858_parse_channels(),\nthe same pointer was further incremented while setting ext_scan_type\nfields for each channel. This resulted in indio_dev->channels being set\nto a pointer past the end of the allocated array, potentially causing\nmemory corruption or undefined behavior.\n\nFix this by iterating over the channels using an explicit index instead\nof incrementing the pointer. This preserves the original base pointer\nand ensures all channel metadata is set correctly."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iio: adc: ad4851: corrección del manejo del puntero de canal ad4858. El puntero devuelto por ad4851_parse_channels_common() se incrementa internamente a medida que se rellena cada canal. En ad4858_parse_channels(), el mismo puntero se incrementó aún más al configurar los campos ext_scan_type para cada canal. Esto provocó que indio_dev->channels se configurara en un puntero más allá del final de la matriz asignada, lo que podría causar corrupción de memoria o un comportamiento indefinido. Corrija esto iterando sobre los canales utilizando un índice explícito en lugar de incrementar el puntero. Esto preserva el puntero base original y garantiza que todos los metadatos del canal se configuren correctamente."
    }
  ],
  "lastModified": "2026-07-30T06:22:54.613",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "versionEndExcluding": "6.15.3",
              "versionStartIncluding": "6.15"
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          ],
          "operator": "OR"
        }
      ]
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  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}