md/raid1: fix memory leak in raid1_run()

{
  "id": "dc2d62d7f6771ae9b1bbc4d9b8c526567390077579e0cf2fce05a45cdceb0f83",
  "url": "https://osv.dev/vulnerability/CVE-2026-45888",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "md/raid1: fix memory leak in raid1_run()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: md/raid1: fix memory leak in raid1_run() raid1_run() calls setup_conf() which registers a thread via md_register_thread(). If raid1_set_limits() fails, the previously registered thread is not unregistered, resulting in a memory leak of the md_thread structure and the thread resource itself. Add md_unregister_thread() to the error path to properly cleanup the thread, which aligns with the error handling logic of other paths in this function. Compile tested only. Issue found using a prototype static analysis tool and code review.",
    "evidence": "osv:CVE-2026-45888",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.75",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.14",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.19.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-45888",
      "aliases": [
        "CVE-2026-45888"
      ],
      "affected": [
        {
          "ranges": [
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              "type": "GIT",
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                {
                  "fixed": "ec10e3dc93994b87adf7c759a4639fe34013989a"
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                {
                  "fixed": "b37588b0282a2b3cdda9db1d53712745ce66dea0"
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                {
                  "fixed": "6abc7d5dcf0ee0f85e16e41c87fbd06231f28753"
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45888.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "6.9.0"
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                  "fixed": "6.12.75"
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.14"
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
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                {
                  "fixed": "6.19.4"
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              ]
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45888.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.532692046Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/6abc7d5dcf0ee0f85e16e41c87fbd06231f28753",
        "https://git.kernel.org/stable/c/b37588b0282a2b3cdda9db1d53712745ce66dea0",
        "https://git.kernel.org/stable/c/c94fd6e8a71efd047ff36930e840f3c25679e136",
        "https://git.kernel.org/stable/c/ec10e3dc93994b87adf7c759a4639fe34013989a",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45888.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-45888",
        "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/2026/45xxx/CVE-2026-45888.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-45888",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 497427,
  "published_at": "2026-05-27T12:16:59.751+00:00"
}