CVE-2026-64180 mm/memory_hotplug: fix memory block reference leak on remove

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "mm/memory_hotplug.c"
    ],
    "versions": [
      {
        "version": "6b8f0798b85aa529011570369db985a788f3003f",
        "lessThan": "b8ab30c79fc00147125b9c39f928561d9dd13d06",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "6b8f0798b85aa529011570369db985a788f3003f",
        "lessThan": "09ce923071e7852ece60d7368e05249bf32c7967",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "6b8f0798b85aa529011570369db985a788f3003f",
        "lessThan": "df64c0d21c3f85f844b2f656333e43d97e6ffa74",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "6b8f0798b85aa529011570369db985a788f3003f",
        "lessThan": "93866f55f7e292fe3d47d36c9efe5ee10213a06b",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "mm/memory_hotplug.c"
    ],
    "versions": [
      {
        "version": "6.8",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.8",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.92",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.34",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0.11",
        "lessThanOrEqual": "7.0.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]