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CVE-2026-46293

Estado: AnalizadaAlta (7.1)—

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

clk: microchip: mpfs-ccc: fix out of bounds access during output registration

UBSAN reported an out of bounds access during registration of the last two outputs. This out of bounds access occurs because space is only allocated in the hws array for two PLLs and the four output dividers that each has, but the defined IDs contain two DLLS and their two outputs each, which are not supported by the driver. The ID order is PLLs -> DLLs -> PLL outputs -> DLL outputs. Decrement the PLL output IDs by two while adding them to the array to avoid the problem.

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/PR:L) que causa acceso fuera de límites en el kernel Linux durante registro de salidas. Permite escalada de privilegios (C:H, A:H) y ejecución de código desde contexto elevado.

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-2026-46293",
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        "source": "nvd@nist.gov",
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          "version": "3.1",
          "baseScore": 7.1,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
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  "published": "2026-06-08T17:16:47.630",
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          "value": "CWE-125"
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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nclk: microchip: mpfs-ccc: fix out of bounds access during output registration\n\nUBSAN reported an out of bounds access during registration of the last\ntwo outputs. This out of bounds access occurs because space is only\nallocated in the hws array for two PLLs and the four output dividers\nthat each has, but the defined IDs contain two DLLS and their two\noutputs each, which are not supported by the driver. The ID order is\nPLLs -> DLLs -> PLL outputs -> DLL outputs. Decrement the PLL output IDs\nby two while adding them to the array to avoid the problem."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nclk: microchip: mpfs-ccc: corregir el acceso fuera de límites durante el registro de salida\n\nUBSAN informó un acceso fuera de límites durante el registro de las dos últimas salidas. Este acceso fuera de límites ocurre porque solo se asigna espacio en el array hws para dos PLLs y los cuatro divisores de salida que cada uno tiene, pero los IDs definidos contienen dos DLLS y sus dos salidas cada uno, que no son soportados por el controlador. El orden de los IDs es PLLs -> DLLs -> salidas de PLL -> salidas de DLL. Decrementar los IDs de salida de PLL en dos mientras se añaden al array para evitar el problema."
    }
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  "lastModified": "2026-07-23T08:10:00.137",
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