FKIE_CVE-2026-74706

Vulnerability from fkie_nvd - Published: 2026-08-22 16:16 - Updated: 2026-10-14 13:10
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: bnge: Fix NULL pointer dereference in aux device release If allocation of auxr_dev fails during auxiliary device setup, the error path calls auxiliary_device_uninit(), which eventually invokes bnge_aux_dev_release(). The release callback unconditionally dereferences aux_priv->auxr_dev->pdev to retrieve the parent bnge_dev. Since auxr_dev has not yet been allocated on this failure path, the dereference results in a NULL pointer exception Retrieve the parent bnge_dev from the auxiliary device's parent instead of auxr_dev, and free auxr_dev only when it was successfully allocated. This allows the release callback to correctly clean up partially initialized auxiliary devices.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1cb4298810e27e037d3ca07286ecbb97e89ba58d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/83ef2f3cab7fe6dd9155cd598dc64be524d963a9
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/broadcom/bnge/bnge_auxr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "83ef2f3cab7fe6dd9155cd598dc64be524d963a9",
              "status": "affected",
              "version": "8ac050ec3b1c0dcb5e89cf86fe2ebe0afcc73554",
              "versionType": "git"
            },
            {
              "lessThan": "1cb4298810e27e037d3ca07286ecbb97e89ba58d",
              "status": "affected",
              "version": "8ac050ec3b1c0dcb5e89cf86fe2ebe0afcc73554",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/broadcom/bnge/bnge_auxr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.19"
            },
            {
              "lessThan": "6.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbnge: Fix NULL pointer dereference in aux device release\n\nIf allocation of auxr_dev fails during auxiliary device setup, the error\npath calls auxiliary_device_uninit(), which eventually invokes\nbnge_aux_dev_release().\n\nThe release callback unconditionally dereferences aux_priv-\u003eauxr_dev-\u003epdev\nto retrieve the parent bnge_dev. Since auxr_dev has not yet been allocated\non this failure path, the dereference results in a NULL pointer exception\n\nRetrieve the parent bnge_dev from the auxiliary device\u0027s parent instead of\nauxr_dev, and free auxr_dev only when it was successfully allocated. This\nallows the release callback to correctly clean up partially initialized\nauxiliary devices."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nbnge: Correcci\u00f3n de desreferencia de puntero NULL en la liberaci\u00f3n de dispositivo auxiliar\n\nSi la asignaci\u00f3n de auxr_dev falla durante la configuraci\u00f3n del dispositivo auxiliar, la ruta de error llama a auxiliary_device_uninit(), que finalmente invoca a bnge_aux_dev_release().\n\nLa devoluci\u00f3n de llamada de liberaci\u00f3n desreferencia incondicionalmente aux_priv -\u003e auxr_dev -\u003e pdev para recuperar el bnge_dev padre. Dado que auxr_dev a\u00fan no ha sido asignado en esta ruta de fallo, la desreferencia resulta en una excepci\u00f3n de puntero NULL.\n\nRecuperar el bnge_dev padre del padre del dispositivo auxiliar en lugar de auxr_dev, y liberar auxr_dev solo cuando fue asignado exitosamente. Esto permite a la devoluci\u00f3n de llamada de liberaci\u00f3n limpiar correctamente los dispositivos auxiliares parcialmente inicializados."
    }
  ],
  "id": "CVE-2026-74706",
  "lastModified": "2026-10-14T13:10:00.187",
  "metrics": {},
  "published": "2026-08-22T16:16:45.333",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1cb4298810e27e037d3ca07286ecbb97e89ba58d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/83ef2f3cab7fe6dd9155cd598dc64be524d963a9"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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