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CVE-2026-23258

Estado: AnalizadaMedia (5.5)—

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

net: liquidio: Initialize netdev pointer before queue setup

In setup_nic_devices(), the netdev is allocated using alloc_etherdev_mq(). However, the pointer to this structure is stored in oct->props[i].netdev only after the calls to netif_set_real_num_rx_queues() and netif_set_real_num_tx_queues().

If either of these functions fails, setup_nic_devices() returns an error without freeing the allocated netdev. Since oct->props[i].netdev is still NULL at this point, the cleanup function liquidio_destroy_nic_device() will fail to find and free the netdev, resulting in a memory leak.

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Fix this by initializing oct->props[i].netdev before calling the queue setup functions. This ensures that the netdev is properly accessible for cleanup in case of errors.

Compile tested only. Issue found using a prototype static analysis tool and code review.

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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          "attackVector": "LOCAL",
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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",
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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: liquidio: Initialize netdev pointer before queue setup\n\nIn setup_nic_devices(), the netdev is allocated using alloc_etherdev_mq().\nHowever, the pointer to this structure is stored in oct->props[i].netdev\nonly after the calls to netif_set_real_num_rx_queues() and\nnetif_set_real_num_tx_queues().\n\nIf either of these functions fails, setup_nic_devices() returns an error\nwithout freeing the allocated netdev. Since oct->props[i].netdev is still\nNULL at this point, the cleanup function liquidio_destroy_nic_device()\nwill fail to find and free the netdev, resulting in a memory leak.\n\nFix this by initializing oct->props[i].netdev before calling the queue\nsetup functions. This ensures that the netdev is properly accessible for\ncleanup in case of errors.\n\nCompile tested only. Issue found using a prototype static analysis tool\nand code review."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet: liquidio: Inicializar el puntero netdev antes de la configuración de la cola\n\nEn setup_nic_devices(), el netdev se asigna usando alloc_etherdev_mq(). Sin embargo, el puntero a esta estructura se almacena en oct->props[i].netdev solo después de las llamadas a netif_set_real_num_rx_queues() y netif_set_real_num_tx_queues().\n\nSi alguna de estas funciones falla, setup_nic_devices() devuelve un error sin liberar el netdev asignado. Dado que oct->props[i].netdev sigue siendo NULL en este punto, la función de limpieza liquidio_destroy_nic_device() no logrará encontrar y liberar el netdev, lo que resultará en una fuga de memoria.\n\nCorrija esto inicializando oct->props[i].netdev antes de llamar a las funciones de configuración de cola. Esto asegura que el netdev sea correctamente accesible para la limpieza en caso de errores.\n\nProbado solo en compilación. Problema encontrado usando una herramienta prototipo de análisis estático y revisión de código."
    }
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  "lastModified": "2026-06-17T10:21:12.127",
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