FKIE_CVE-2026-64180

Vulnerability from fkie_nvd - Published: 2026-07-19 16:18 - Updated: 2026-07-19 16:18
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/memory_hotplug: fix memory block reference leak on remove Patch series "mm: Fix memory block leaks and locking", v2. This series fixes two memory block device reference leaks and one locking issue around the per-memory_block hwpoison counter. This patch (of 2): remove_memory_blocks_and_altmaps() looks up each memory block with find_memory_block(), which acquires a reference to the memory block device. That reference is never dropped on this path, resulting in a leaked device reference when removing memory blocks and their altmaps. Drop the reference after retrieving mem->altmap and clearing mem->altmap, before removing the memory block device.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/09ce923071e7852ece60d7368e05249bf32c7967
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/93866f55f7e292fe3d47d36c9efe5ee10213a06b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b8ab30c79fc00147125b9c39f928561d9dd13d06
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/df64c0d21c3f85f844b2f656333e43d97e6ffa74
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "mm/memory_hotplug.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b8ab30c79fc00147125b9c39f928561d9dd13d06",
              "status": "affected",
              "version": "6b8f0798b85aa529011570369db985a788f3003f",
              "versionType": "git"
            },
            {
              "lessThan": "09ce923071e7852ece60d7368e05249bf32c7967",
              "status": "affected",
              "version": "6b8f0798b85aa529011570369db985a788f3003f",
              "versionType": "git"
            },
            {
              "lessThan": "df64c0d21c3f85f844b2f656333e43d97e6ffa74",
              "status": "affected",
              "version": "6b8f0798b85aa529011570369db985a788f3003f",
              "versionType": "git"
            },
            {
              "lessThan": "93866f55f7e292fe3d47d36c9efe5ee10213a06b",
              "status": "affected",
              "version": "6b8f0798b85aa529011570369db985a788f3003f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "mm/memory_hotplug.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.8"
            },
            {
              "lessThan": "6.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.92",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.34",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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",
  "lastModified": "2026-07-19T16:18:00.397",
  "metrics": {},
  "published": "2026-07-19T16:18:00.397",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/09ce923071e7852ece60d7368e05249bf32c7967"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/93866f55f7e292fe3d47d36c9efe5ee10213a06b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b8ab30c79fc00147125b9c39f928561d9dd13d06"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/df64c0d21c3f85f844b2f656333e43d97e6ffa74"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.