ghsa-73pc-m2pm-2mr8
Vulnerability from github
Published
2025-04-16 15:34
Modified
2025-10-31 21:30
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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.

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

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{
  "affected": [],
  "aliases": [
    "CVE-2025-22084"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-04-16T15:16:02Z",
    "severity": "MODERATE"
  },
  "details": "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\u0027s receive_buf handler, as it assumes\nserdev-\u003eops 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().",
  "id": "GHSA-73pc-m2pm-2mr8",
  "modified": "2025-10-31T21:30:55Z",
  "published": "2025-04-16T15:34:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-22084"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0dd6770a72f138dabea9eae87f3da6ffa68f0d06"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4f750b84628080ff0d67bf1af67a4967b740acf2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/64ab50577c59bb7049bec6b5c42d1c38e4029f29"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cc6b0ec7cccbf66ef3621e9e93296b7bd1f52298"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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