CVE-2026-23237 (GCVE-0-2026-23237)
Vulnerability from cvelistv5
Published
2026-03-04 14:38
Modified
2026-03-08 10:07
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: platform/x86: classmate-laptop: Add missing NULL pointer checks In a few places in the Classmate laptop driver, code using the accel object may run before that object's address is stored in the driver data of the input device using it. For example, cmpc_accel_sensitivity_store_v4() is the "show" method of cmpc_accel_sensitivity_attr_v4 which is added in cmpc_accel_add_v4(), before calling dev_set_drvdata() for inputdev->dev. If the sysfs attribute is accessed prematurely, the dev_get_drvdata(&inputdev->dev) call in in cmpc_accel_sensitivity_store_v4() returns NULL which leads to a NULL pointer dereference going forward. Moreover, sysfs attributes using the input device are added before initializing that device by cmpc_add_acpi_notify_device() and if one of them is accessed before running that function, a NULL pointer dereference will occur. For example, cmpc_accel_sensitivity_attr_v4 is added before calling cmpc_add_acpi_notify_device() and if it is read prematurely, the dev_get_drvdata(&acpi->dev) call in cmpc_accel_sensitivity_show_v4() returns NULL which leads to a NULL pointer dereference going forward. Fix this by adding NULL pointer checks in all of the relevant places.
References
Impacted products
Vendor Product Version
Linux Linux Version: 529aa8cb0a59367d08883f818e8c47028e819d0d
Version: 529aa8cb0a59367d08883f818e8c47028e819d0d
Version: 529aa8cb0a59367d08883f818e8c47028e819d0d
Version: 529aa8cb0a59367d08883f818e8c47028e819d0d
Version: 529aa8cb0a59367d08883f818e8c47028e819d0d
Version: 529aa8cb0a59367d08883f818e8c47028e819d0d
Version: 529aa8cb0a59367d08883f818e8c47028e819d0d
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{
  "containers": {
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          "product": "Linux",
          "programFiles": [
            "drivers/platform/x86/classmate-laptop.c"
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: classmate-laptop: Add missing NULL pointer checks\n\nIn a few places in the Classmate laptop driver, code using the accel\nobject may run before that object\u0027s address is stored in the driver\ndata of the input device using it.\n\nFor example, cmpc_accel_sensitivity_store_v4() is the \"show\" method\nof cmpc_accel_sensitivity_attr_v4 which is added in cmpc_accel_add_v4(),\nbefore calling dev_set_drvdata() for inputdev-\u003edev.  If the sysfs\nattribute is accessed prematurely, the dev_get_drvdata(\u0026inputdev-\u003edev)\ncall in in cmpc_accel_sensitivity_store_v4() returns NULL which\nleads to a NULL pointer dereference going forward.\n\nMoreover, sysfs attributes using the input device are added before\ninitializing that device by cmpc_add_acpi_notify_device() and if one\nof them is accessed before running that function, a NULL pointer\ndereference will occur.\n\nFor example, cmpc_accel_sensitivity_attr_v4 is added before calling\ncmpc_add_acpi_notify_device() and if it is read prematurely, the\ndev_get_drvdata(\u0026acpi-\u003edev) call in cmpc_accel_sensitivity_show_v4()\nreturns NULL which leads to a NULL pointer dereference going forward.\n\nFix this by adding NULL pointer checks in all of the relevant places."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-08T10:07:33.737Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/993708fc18d0d0919db438361b4e8c1f980a8d1b"
        },
        {
          "url": "https://git.kernel.org/stable/c/af673209d43b46257540997aba042b90ef3258c0"
        },
        {
          "url": "https://git.kernel.org/stable/c/eb214804f03c829decf10998e9b7dd26f4c8ab9e"
        },
        {
          "url": "https://git.kernel.org/stable/c/9cf4b9b8ad09d6e05307abc4e951cabdff4be652"
        },
        {
          "url": "https://git.kernel.org/stable/c/da6e06a5fdbabea3870d18c227734b5dea5b3be6"
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        {
          "url": "https://git.kernel.org/stable/c/97528b1622b8f129574d29a571c32a3c85eafa3c"
        },
        {
          "url": "https://git.kernel.org/stable/c/fe747d7112283f47169e9c16e751179a9b38611e"
        }
      ],
      "title": "platform/x86: classmate-laptop: Add missing NULL pointer checks",
      "x_generator": {
        "engine": "bippy-1.2.0"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23237",
    "datePublished": "2026-03-04T14:38:41.815Z",
    "dateReserved": "2026-01-13T15:37:45.988Z",
    "dateUpdated": "2026-03-08T10:07:33.737Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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