Vulnerability-Lookup

FKIE_CVE-2026-64180

Vulnerability from fkie_nvd - Published: 2026-07-19 16:18 - Updated: 2026-08-12 15:28

Severity

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/09ce923071e7852ece60d7368e05249bf32c7967	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/93866f55f7e292fe3d47d36c9efe5ee10213a06b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b8ab30c79fc00147125b9c39f928561d9dd13d06	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/df64c0d21c3f85f844b2f656333e43d97e6ffa74	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "mm/memory_hotplug.c"
          ],
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          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
            },
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          ],
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.8"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.12.92",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "6.18.34",
              "versionType": "semver"
            },
            {
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              "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"
    }
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  "configurations": [
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      "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": "2026-08-12T15:28:41.917",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
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  "published": "2026-07-19T16:18:00.397",
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "value": "NVD-CWE-Other"
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      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-64180 (GCVE-0-2026-64180)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:41 – Updated: 2026-07-19 15:41

Title

mm/memory_hotplug: fix memory block reference leak on remove

Summary

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6843 records in the last 180 days details

References

4 references

URL	Tags
https://git.kernel.org/stable/c/b8ab30c79fc001471…
https://git.kernel.org/stable/c/09ce923071e7852ec…
https://git.kernel.org/stable/c/df64c0d21c3f85f84…
https://git.kernel.org/stable/c/93866f55f7e292fe3…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 6b8f0798b85aa529011570369db985a788f3003f , < b8ab30c79fc00147125b9c39f928561d9dd13d06 (git) Affected: 6b8f0798b85aa529011570369db985a788f3003f , < 09ce923071e7852ece60d7368e05249bf32c7967 (git) Affected: 6b8f0798b85aa529011570369db985a788f3003f , < df64c0d21c3f85f844b2f656333e43d97e6ffa74 (git) Affected: 6b8f0798b85aa529011570369db985a788f3003f , < 93866f55f7e292fe3d47d36c9efe5ee10213a06b (git)
Linux	Linux	Affected: 6.8 Unaffected: 0 , < 6.8 (semver) Unaffected: 6.12.92 , ≤ 6.12.* (semver) Unaffected: 6.18.34 , ≤ 6.18.* (semver) Unaffected: 7.0.11 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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          "defaultStatus": "unaffected",
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          "programFiles": [
            "mm/memory_hotplug.c"
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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.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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