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CVE-2022-49134

Estado: ModificadaMedia (5.5)—

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

mlxsw: spectrum: Guard against invalid local ports

When processing events generated by the device's firmware, the driver protects itself from events reported for non-existent local ports, but not for the CPU port (local port 0), which exists, but does not have all the fields as any local port.

This can result in a NULL pointer dereference when trying access 'struct mlxsw_sp_port' fields which are not initialized for CPU port.

Commit 63b08b1f6834 ("mlxsw: spectrum: Protect driver from buggy firmware") already handled such issue by bailing early when processing a PUDE event reported for the CPU port.

Leer descripción completaMostrar menos

Generalize the approach by moving the check to a common function and making use of it in all relevant places.

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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  "id": "CVE-2022-49134",
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "none"
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            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2025-10-01T19:48:13.504357Z"
        }
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          "integrityImpact": "NONE",
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          "programFiles": [
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            "drivers/net/ethernet/mellanox/mlxsw/spectrum.h",
            "drivers/net/ethernet/mellanox/mlxsw/spectrum_ptp.c",
            "drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c"
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          "programFiles": [
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            "drivers/net/ethernet/mellanox/mlxsw/spectrum.h",
            "drivers/net/ethernet/mellanox/mlxsw/spectrum_ptp.c",
            "drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c"
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  "published": "2025-02-26T07:00:50.680",
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmlxsw: spectrum: Guard against invalid local ports\n\nWhen processing events generated by the device's firmware, the driver\nprotects itself from events reported for non-existent local ports, but\nnot for the CPU port (local port 0), which exists, but does not have all\nthe fields as any local port.\n\nThis can result in a NULL pointer dereference when trying access\n'struct mlxsw_sp_port' fields which are not initialized for CPU port.\n\nCommit 63b08b1f6834 (\"mlxsw: spectrum: Protect driver from buggy firmware\")\nalready handled such issue by bailing early when processing a PUDE event\nreported for the CPU port.\n\nGeneralize the approach by moving the check to a common function and\nmaking use of it in all relevant places."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mlxsw: spectrum: Proteger contra puertos locales no válidos Al procesar eventos generados por el firmware del dispositivo, el controlador se protege a sí mismo de los eventos informados para puertos locales inexistentes, pero no para el puerto de la CPU (puerto local 0), que existe, pero no tiene todos los campos como cualquier puerto local. Esto puede resultar en una desreferencia de puntero NULL al intentar acceder a los campos 'struct mlxsw_sp_port' que no están inicializados para el puerto de la CPU. el commit 63b08b1f6834 (\"mlxsw: spectrum: Proteger al controlador del firmware con errores\") ya manejó este problema al abandonar temprano al procesar un evento PUDE informado para el puerto de la CPU. Generalice el enfoque moviendo la verificación a una función común y haciendo uso de ella en todos los lugares relevantes."
    }
  ],
  "lastModified": "2026-06-17T05:17:10.870",
  "configurations": [
    {
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}