{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "6b8f0798b85aa529011570369db985a788f3003f"
            },
            {
              "fixed": "b8ab30c79fc00147125b9c39f928561d9dd13d06"
            },
            {
              "fixed": "09ce923071e7852ece60d7368e05249bf32c7967"
            },
            {
              "fixed": "df64c0d21c3f85f844b2f656333e43d97e6ffa74"
            },
            {
              "fixed": "93866f55f7e292fe3d47d36c9efe5ee10213a06b"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.8.0"
            },
            {
              "fixed": "6.12.92"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.34"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64180.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/memory_hotplug: fix memory block reference leak on remove\n\nPatch series \"mm: Fix memory block leaks and locking\", v2.\n\nThis series fixes two memory block device reference leaks and one locking\nissue around the per-memory_block hwpoison counter.\n\n\nThis patch (of 2):\n\nremove_memory_blocks_and_altmaps() looks up each memory block with\nfind_memory_block(), which acquires a reference to the memory block\ndevice.\n\nThat reference is never dropped on this path, resulting in a leaked device\nreference when removing memory blocks and their altmaps.  Drop the\nreference after retrieving mem-\u003ealtmap and clearing mem-\u003ealtmap, before\nremoving the memory block device.",
  "id": "CVE-2026-64180",
  "modified": "2026-07-21T03:41:48.417448897Z",
  "published": "2026-07-19T15:41:03.751Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/09ce923071e7852ece60d7368e05249bf32c7967"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/93866f55f7e292fe3d47d36c9efe5ee10213a06b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b8ab30c79fc00147125b9c39f928561d9dd13d06"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/df64c0d21c3f85f844b2f656333e43d97e6ffa74"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64180.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64180"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "mm/memory_hotplug: fix memory block reference leak on remove"
}