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

Vulnerability from cvelistv5 – Published: 2026-07-19 15:41 – Updated: 2026-07-19 15:41
VLAI
Title
mm/memory_hotplug: fix memory block reference leak on remove
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 6b8f0798b85aa529011570369db985a788f3003f , < b8ab30c79fc00147125b9c39f928561d9dd13d06 (git)
Affected: 6b8f0798b85aa529011570369db985a788f3003f , < 09ce923071e7852ece60d7368e05249bf32c7967 (git)
Affected: 6b8f0798b85aa529011570369db985a788f3003f , < df64c0d21c3f85f844b2f656333e43d97e6ffa74 (git)
Affected: 6b8f0798b85aa529011570369db985a788f3003f , < 93866f55f7e292fe3d47d36c9efe5ee10213a06b (git)
Create a notification for this product.
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)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.92",
                  "versionStartIncluding": "6.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.34",
                  "versionStartIncluding": "6.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.11",
                  "versionStartIncluding": "6.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-19T15:41:03.751Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b8ab30c79fc00147125b9c39f928561d9dd13d06"
        },
        {
          "url": "https://git.kernel.org/stable/c/09ce923071e7852ece60d7368e05249bf32c7967"
        },
        {
          "url": "https://git.kernel.org/stable/c/df64c0d21c3f85f844b2f656333e43d97e6ffa74"
        },
        {
          "url": "https://git.kernel.org/stable/c/93866f55f7e292fe3d47d36c9efe5ee10213a06b"
        }
      ],
      "title": "mm/memory_hotplug: fix memory block reference leak on remove",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64180",
    "datePublished": "2026-07-19T15:41:03.751Z",
    "dateReserved": "2026-07-19T07:54:57.039Z",
    "dateUpdated": "2026-07-19T15:41:03.751Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-64180",
      "date": "2026-07-20",
      "epss": "0.00157",
      "percentile": "0.05246"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-64180\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-19T16:18:00.397\",\"lastModified\":\"2026-07-19T16:18:00.397\",\"vulnStatus\":\"Received\",\"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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"mm/memory_hotplug.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6b8f0798b85aa529011570369db985a788f3003f\",\"lessThan\":\"b8ab30c79fc00147125b9c39f928561d9dd13d06\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6b8f0798b85aa529011570369db985a788f3003f\",\"lessThan\":\"09ce923071e7852ece60d7368e05249bf32c7967\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6b8f0798b85aa529011570369db985a788f3003f\",\"lessThan\":\"df64c0d21c3f85f844b2f656333e43d97e6ffa74\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6b8f0798b85aa529011570369db985a788f3003f\",\"lessThan\":\"93866f55f7e292fe3d47d36c9efe5ee10213a06b\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"mm/memory_hotplug.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.8\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.8\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.92\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.34\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.11\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}



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.