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

{
  "id": "3e9bb40256b48d9cc5e5b9c72d4dbb947ac0c054b9f22f7cfd378facb38aeaee",
  "url": "https://osv.dev/vulnerability/CVE-2022-50481",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "cxl: fix possible null-ptr-deref in cxl_guest_init_afu|adapter()",
    "summary": "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.",
    "evidence": "osv:CVE-2022-50481",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "4.9.337",
            "evidence": "/affected/1/ranges"
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            "value": "4.14.303",
            "evidence": "/affected/1/ranges"
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            "value": "4.19.270",
            "evidence": "/affected/1/ranges"
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            "value": "6.0.16",
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            "value": "6.1.2",
            "evidence": "/affected/1/ranges"
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        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-50481",
      "aliases": [
        "CVE-2022-50481"
      ],
      "affected": [
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                  "fixed": "60b2ed21a65f3f5318666ccd765c3507991370cf"
                },
                {
                  "fixed": "170e8c2d2b61e15e7f7cfeded81bc1e959a15ed8"
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                {
                  "fixed": "e5021bbf11b024cc65ea1e84c377df484183be4b"
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      ],
      "modified": "2026-10-28T02:30:30.293500596Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/170e8c2d2b61e15e7f7cfeded81bc1e959a15ed8",
        "https://git.kernel.org/stable/c/1ae581696b7a799afa39a664c4b721569643f58a",
        "https://git.kernel.org/stable/c/60b2ed21a65f3f5318666ccd765c3507991370cf",
        "https://git.kernel.org/stable/c/61c80d1c3833e196256fb060382db94f24d3d9a7",
        "https://git.kernel.org/stable/c/96fba6fb95bdede80583c262ac185da09661f264",
        "https://git.kernel.org/stable/c/ab44c182353be101c3be9465e1d15d42130c53c4",
        "https://git.kernel.org/stable/c/b32559ee4e6667c5c3daf4ec5454c277d1f255d2",
        "https://git.kernel.org/stable/c/d775a1da5a52b4f4bb02f2707ba420d1bec48dbb",
        "https://git.kernel.org/stable/c/e5021bbf11b024cc65ea1e84c377df484183be4b",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50481.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-50481",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50481.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-50481",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 496970,
  "published_at": "2025-10-04T15:16:40.374+00:00"
}