ghsa-2fm3-57pq-4jp3
Vulnerability from github
Published
2025-10-04 18:31
Modified
2025-10-04 18:31
Details

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

cxl: fix possible null-ptr-deref in cxl_guest_init_afu|adapter()

If device_register() fails in cxl_register_afu|adapter(), the device is not added, device_unregister() can not be called in the error path, otherwise it will cause a null-ptr-deref because of removing not added device.

As comment of device_register() says, it should use put_device() to give up the reference in the error path. So split device_unregister() into device_del() and put_device(), then goes to put dev when register fails.

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50481"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-04T16:15:44Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl: fix possible null-ptr-deref in cxl_guest_init_afu|adapter()\n\nIf device_register() fails in cxl_register_afu|adapter(), the device\nis not added, device_unregister() can not be called in the error path,\notherwise it will cause a null-ptr-deref because of removing not added\ndevice.\n\nAs comment of device_register() says, it should use put_device() to give\nup the reference in the error path. So split device_unregister() into\ndevice_del() and put_device(), then goes to put dev when register fails.",
  "id": "GHSA-2fm3-57pq-4jp3",
  "modified": "2025-10-04T18:31:13Z",
  "published": "2025-10-04T18:31:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50481"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/170e8c2d2b61e15e7f7cfeded81bc1e959a15ed8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1ae581696b7a799afa39a664c4b721569643f58a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/60b2ed21a65f3f5318666ccd765c3507991370cf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/61c80d1c3833e196256fb060382db94f24d3d9a7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/96fba6fb95bdede80583c262ac185da09661f264"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ab44c182353be101c3be9465e1d15d42130c53c4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b32559ee4e6667c5c3daf4ec5454c277d1f255d2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d775a1da5a52b4f4bb02f2707ba420d1bec48dbb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e5021bbf11b024cc65ea1e84c377df484183be4b"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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