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CVE-2025-38054

Estado: AnalizadaMedia (5.5)—

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

ptp: ocp: Limit signal/freq counts in summary output functions

The debugfs summary output could access uninitialized elements in the freq_in[] and signal_out[] arrays, causing NULL pointer dereferences and triggering a kernel Oops (page_fault_oops). This patch adds u8 fields (nr_freq_in, nr_signal_out) to track the number of initialized elements, with a maximum of 4 per array. The summary output functions are updated to respect these limits, preventing out-of-bounds access and ensuring safe array handling.

Widen the label variables because the change confuses GCC about max length of the strings.

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 (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
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  "published": "2025-06-18T10:15:38.083",
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          "value": "CWE-908"
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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nptp: ocp: Limit signal/freq counts in summary output functions\n\nThe debugfs summary output could access uninitialized elements in\nthe freq_in[] and signal_out[] arrays, causing NULL pointer\ndereferences and triggering a kernel Oops (page_fault_oops).\nThis patch adds u8 fields (nr_freq_in, nr_signal_out) to track the\nnumber of initialized elements, with a maximum of 4 per array.\nThe summary output functions are updated to respect these limits,\npreventing out-of-bounds access and ensuring safe array handling.\n\nWiden the label variables because the change confuses GCC about\nmax length of the strings."
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      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ptp: ocp: Limitar el conteo de señales/frecuencias en las funciones de salida de resumen. La salida de resumen de debugfs podría acceder a elementos no inicializados en las matrices freq_in[] y signal_out[], lo que causa desreferencias de punteros nulos y desencadena un error de kernel (page_fault_oops). Este parche agrega campos u8 (nr_freq_in, nr_signal_out) para rastrear el número de elementos inicializados, con un máximo de 4 por matriz. Las funciones de salida de resumen se actualizan para respetar estos límites, lo que evita el acceso fuera de los límites y garantiza el manejo seguro de la matriz. Amplíe las variables de etiqueta porque el cambio confunde a GCC sobre la longitud máxima de las cadenas."
    }
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  "lastModified": "2026-06-17T09:15:57.767",
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