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CVE-2025-38134

Estado: AnalizadaMedia (5.5)—

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

usb: acpi: Prevent null pointer dereference in usb_acpi_add_usb4_devlink()

As demonstrated by the fix for update_port_device_state, commit 12783c0b9e2c ("usb: core: Prevent null pointer dereference in update_port_device_state"), usb_hub_to_struct_hub() can return NULL in certain scenarios, such as during hub driver unbind or teardown race conditions, even if the underlying usb_device structure exists.

Plus, all other places that call usb_hub_to_struct_hub() in the same file do check for NULL return values.

If usb_hub_to_struct_hub() returns NULL, the subsequent access to hub->ports[udev->portnum - 1] will cause a null pointer dereference.

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)

Mostrar
{
  "id": "CVE-2025-38134",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "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",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
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        "impactScore": 3.6,
        "exploitabilityScore": 1.8
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          "vendor": "Linux",
          "product": "Linux",
          "versions": [
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              "versionType": "git"
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              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix",
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          ],
          "programFiles": [
            "drivers/usb/core/usb-acpi.c"
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          "defaultStatus": "affected"
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  "published": "2025-07-03T09:15:27.837",
  "references": [
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      "url": "https://git.kernel.org/stable/c/73fb0ec9436ae87bcae067ce35d6cdd72bade86c",
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      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: acpi: Prevent null pointer dereference in usb_acpi_add_usb4_devlink()\n\nAs demonstrated by the fix for update_port_device_state,\ncommit 12783c0b9e2c (\"usb: core: Prevent null pointer dereference in update_port_device_state\"),\nusb_hub_to_struct_hub() can return NULL in certain scenarios,\nsuch as during hub driver unbind or teardown race conditions,\neven if the underlying usb_device structure exists.\n\nPlus, all other places that call usb_hub_to_struct_hub() in the same file\ndo check for NULL return values.\n\nIf usb_hub_to_struct_hub() returns NULL, the subsequent access to\nhub->ports[udev->portnum - 1] will cause a null pointer dereference."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: usb: acpi: Evitar la desreferencia de puntero nulo en usb_acpi_add_usb4_devlink(). Como se demuestra en la corrección para update_port_device_state, commit 12783c0b9e2c (\"usb: core: Evitar la desreferencia de puntero nulo en update_port_device_state\"), usb_hub_to_struct_hub() puede devolver NULL en ciertos escenarios, como durante la desvinculación del controlador del concentrador o en condiciones de ejecuciones de desmontaje, incluso si la estructura usb_device subyacente existe. Además, todos los demás lugares que llaman a usb_hub_to_struct_hub() en el mismo archivo comprueban si hay valores de retorno NULL. Si usb_hub_to_struct_hub() devuelve NULL, el acceso posterior a hub->ports[udev->portnum - 1] provocará una desreferencia de puntero nulo."
    }
  ],
  "lastModified": "2026-06-17T09:16:07.433",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "matchCriteriaId": "D349613A-2E37-4539-B97E-D97F5D92A03C",
              "versionEndExcluding": "6.12.34",
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          "operator": "OR"
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}