dm clone: Fix UAF in clone_dtr()

{
  "id": "67cec472163c6e32e53593d15bc7c708b8c54851fddc5341c23757e55cb72d3a",
  "url": "https://osv.dev/vulnerability/CVE-2022-50843",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "dm clone: Fix UAF in clone_dtr()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: dm clone: Fix UAF in clone_dtr() Dm_clone also has the same UAF problem when dm_resume() and dm_destroy() are concurrent. Therefore, cancelling timer again in clone_dtr().",
    "evidence": "osv:CVE-2022-50843",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "5.4.229",
            "evidence": "/affected/1/ranges"
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            "value": "5.10.163",
            "evidence": "/affected/1/ranges"
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            "value": "5.15.87",
            "evidence": "/affected/1/ranges"
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          {
            "value": "6.0.18",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.4",
            "evidence": "/affected/1/ranges"
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        "affected_versions": []
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    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-50843",
      "aliases": [
        "CVE-2022-50843"
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      "affected": [
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                  "fixed": "9e113cd4f61f3b0000843b2d0a90ce8b40a1fcff"
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      ],
      "modified": "2026-10-28T02:30:30.599382187Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/342cfd8426dff4228e6c714bcb9fc8295a2748dd",
        "https://git.kernel.org/stable/c/520b56cfd9faee7683f081c3a38f11a81b13a68e",
        "https://git.kernel.org/stable/c/856edd0e92f3fe89606b704c86a93daedddfe6ec",
        "https://git.kernel.org/stable/c/9e113cd4f61f3b0000843b2d0a90ce8b40a1fcff",
        "https://git.kernel.org/stable/c/b1ddb666073bb5f36390aaabaa1a4d48d78c52ed",
        "https://git.kernel.org/stable/c/e4b5957c6f749a501c464f92792f1c8e26b61a94",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50843.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-50843",
        "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-2022-50843.json"
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    "related_cves": [
      {
        "value": "CVE-2022-50843",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 497743,
  "published_at": "2025-12-30T12:11:01.13+00:00"
}