ghsa-xq4p-6j59-jfv4
Vulnerability from github
Published
2024-05-17 15:31
Modified
2024-05-17 15:31
Details

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

usb: typec: altmodes/displayport: create sysfs nodes as driver's default device attribute group

The DisplayPort driver's sysfs nodes may be present to the userspace before typec_altmode_set_drvdata() completes in dp_altmode_probe. This means that a sysfs read can trigger a NULL pointer error by deferencing dp->hpd in hpd_show or dp->lock in pin_assignment_show, as dev_get_drvdata() returns NULL in those cases.

Remove manual sysfs node creation in favor of adding attribute group as default for devices bound to the driver. The ATTRIBUTE_GROUPS() macro is not used here otherwise the path to the sysfs nodes is no longer compliant with the ABI.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-35790"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-17T13:15:58Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: altmodes/displayport: create sysfs nodes as driver\u0027s default device attribute group\n\nThe DisplayPort driver\u0027s sysfs nodes may be present to the userspace before\ntypec_altmode_set_drvdata() completes in dp_altmode_probe. This means that\na sysfs read can trigger a NULL pointer error by deferencing dp-\u003ehpd in\nhpd_show or dp-\u003elock in pin_assignment_show, as dev_get_drvdata() returns\nNULL in those cases.\n\nRemove manual sysfs node creation in favor of adding attribute group as\ndefault for devices bound to the driver. The ATTRIBUTE_GROUPS() macro is\nnot used here otherwise the path to the sysfs nodes is no longer compliant\nwith the ABI.",
  "id": "GHSA-xq4p-6j59-jfv4",
  "modified": "2024-05-17T15:31:08Z",
  "published": "2024-05-17T15:31:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-35790"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0ad011776c057ce881b7fd6d8c79ecd459c087e9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/165376f6b23e9a779850e750fb2eb06622e5a531"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4a22aeac24d0d5f26ba741408e8b5a4be6dc5dc0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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