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CVE-2025-22084

Estado: AnalizadaMedia (5.5)—

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

w1: fix NULL pointer dereference in probe

The w1_uart_probe() function calls w1_uart_serdev_open() (which includes devm_serdev_device_open()) before setting the client ops via serdev_device_set_client_ops(). This ordering can trigger a NULL pointer dereference in the serdev controller's receive_buf handler, as it assumes serdev->ops is valid when SERPORT_ACTIVE is set.

This is similar to the issue fixed in commit 5e700b384ec1 ("platform/chrome: cros_ec_uart: properly fix race condition") where devm_serdev_device_open() was called before fully initializing the device.

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Fix the race by ensuring client ops are set before enabling the port via w1_uart_serdev_open().

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-2025-22084",
  "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"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
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          "vendor": "Linux",
          "product": "Linux",
          "versions": [
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            {
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          ],
          "programFiles": [
            "drivers/w1/masters/w1-uart.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.9"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.9",
              "versionType": "semver"
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              "version": "6.12.23",
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              "version": "6.13.11",
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              "version": "6.14.2",
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              "lessThanOrEqual": "6.14.*"
            },
            {
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/w1/masters/w1-uart.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-04-16T15:16:02.607",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0dd6770a72f138dabea9eae87f3da6ffa68f0d06",
      "tags": [
        "Patch"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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    {
      "url": "https://git.kernel.org/stable/c/4f750b84628080ff0d67bf1af67a4967b740acf2",
      "tags": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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    {
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      "tags": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "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\nw1: fix NULL pointer dereference in probe\n\nThe w1_uart_probe() function calls w1_uart_serdev_open() (which includes\ndevm_serdev_device_open()) before setting the client ops via\nserdev_device_set_client_ops(). This ordering can trigger a NULL pointer\ndereference in the serdev controller's receive_buf handler, as it assumes\nserdev->ops is valid when SERPORT_ACTIVE is set.\n\nThis is similar to the issue fixed in commit 5e700b384ec1\n(\"platform/chrome: cros_ec_uart: properly fix race condition\") where\ndevm_serdev_device_open() was called before fully initializing the\ndevice.\n\nFix the race by ensuring client ops are set before enabling the port via\nw1_uart_serdev_open()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: w1: corrección de la desreferencia de puntero nulo en la sonda. La función w1_uart_probe() llama a w1_uart_serdev_open() (que incluye devm_serdev_device_open()) antes de configurar las operaciones del cliente mediante serdev_device_set_client_ops(). Este orden puede desencadenar una desreferencia de puntero nulo en el controlador receive_buf del controlador serdev, ya que asume que serdev->ops es válido cuando SERPORT_ACTIVE está configurado. Esto es similar al problema corregido en el commit 5e700b384ec1 (\"platform/chrome: cros_ec_uart: corregir correctamente la condición de ejecución\") donde se llamó a devm_serdev_device_open() antes de inicializar completamente el dispositivo. Corrija la ejecución asegurándose de que las operaciones del cliente estén configuradas antes de habilitar el puerto mediante w1_uart_serdev_open()."
    }
  ],
  "lastModified": "2026-06-17T08:45:00.683",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "10F3EB18-ACA3-4775-AC8D-C1CC227D2763",
              "versionEndExcluding": "6.12.23",
              "versionStartIncluding": "6.9"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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            {
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              "vulnerable": true,
              "matchCriteriaId": "FADAE5D8-4808-442C-B218-77B2CE8780A0",
              "versionEndExcluding": "6.14.2",
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            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}