Vulnerability-Lookup

GHSA-9438-9QFW-M4V5

Vulnerability from github – Published: 2026-03-04 15:30 – Updated: 2026-03-04 15:30

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23237"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-04T15:16:14Z",
    "severity": null
  },
  "details": "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.",
  "id": "GHSA-9438-9qfw-m4v5",
  "modified": "2026-03-04T15:30:36Z",
  "published": "2026-03-04T15:30:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23237"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/97528b1622b8f129574d29a571c32a3c85eafa3c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/993708fc18d0d0919db438361b4e8c1f980a8d1b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9cf4b9b8ad09d6e05307abc4e951cabdff4be652"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/af673209d43b46257540997aba042b90ef3258c0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/da6e06a5fdbabea3870d18c227734b5dea5b3be6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eb214804f03c829decf10998e9b7dd26f4c8ab9e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fe747d7112283f47169e9c16e751179a9b38611e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-23237 (GCVE-0-2026-23237)

Vulnerability from cvelistv5 – Published: 2026-03-04 14:38 – Updated: 2026-03-04 14:38

Title

platform/x86: classmate-laptop: Add missing NULL pointer checks

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.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/993708fc18d0d0919…
	https://git.kernel.org/stable/c/af673209d43b46257…
	https://git.kernel.org/stable/c/eb214804f03c829de…
	https://git.kernel.org/stable/c/9cf4b9b8ad09d6e05…
	https://git.kernel.org/stable/c/da6e06a5fdbabea38…
	https://git.kernel.org/stable/c/97528b1622b8f1295…
	https://git.kernel.org/stable/c/fe747d7112283f471…

Impacted products

Vendor

Product

Version

Linux

Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 993708fc18d0d0919db438361b4e8c1f980a8d1b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < af673209d43b46257540997aba042b90ef3258c0 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < eb214804f03c829decf10998e9b7dd26f4c8ab9e (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9cf4b9b8ad09d6e05307abc4e951cabdff4be652 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < da6e06a5fdbabea3870d18c227734b5dea5b3be6 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 97528b1622b8f129574d29a571c32a3c85eafa3c (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < fe747d7112283f47169e9c16e751179a9b38611e (git)

Linux

Unaffected: 5.10.251 , ≤ 5.10.* (semver)
Unaffected: 5.15.201 , ≤ 5.15.* (semver)
Unaffected: 6.1.164 , ≤ 6.1.* (semver)
Unaffected: 6.6.127 , ≤ 6.6.* (semver)
Unaffected: 6.12.74 , ≤ 6.12.* (semver)
Unaffected: 6.18.13 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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        {
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              "versionType": "semver"
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            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.201",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.1.164",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.127",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.74",
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            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
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    "datePublished": "2026-03-04T14:38:41.815Z",
    "dateReserved": "2026-01-13T15:37:45.988Z",
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}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-9438-9QFW-M4V5

CVE-2026-23237 (GCVE-0-2026-23237)

Tags

Sightings

Nomenclature