Vulnerability-Lookup

FKIE_CVE-2026-64244

Vulnerability from fkie_nvd - Published: 2026-07-24 16:16 - Updated: 2026-08-17 19:25

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: drivers/base/memory: set mem->altmap after successful device registration If __add_memory_block() fails at xa_store() (under memory pressure for example), device_unregister() is called, which eventually triggers memory_block_release() with mem->altmap still set, causing a WARN_ON(mem->altmap). This was triggered by modifying virtio-mem driver. Fix this by delaying the assignment of mem->altmap until after __add_memory_block() has succeeded.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/059ac6252a63edf1cea79bf30bd860a8c264b62c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/22dc0d042f02ce82aa61422ea5f232628bfd9e9c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6c25bf4e44a2b6a14332f952bba0974521f5b72d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/802e113cf120df7208e4c7e604950a85e87120a8	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a2b8d7827f48ee54a686cb80e4a1d0ff954ec42a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/bc3dd82a0ffd488bb902f4c69c3d28fd4088d973	Patch

Impacted products

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

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/base/memory.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "802e113cf120df7208e4c7e604950a85e87120a8",
              "status": "affected",
              "version": "1a8c64e110435e44e71bcd50a75663174b575f22",
              "versionType": "git"
            },
            {
              "lessThan": "22dc0d042f02ce82aa61422ea5f232628bfd9e9c",
              "status": "affected",
              "version": "1a8c64e110435e44e71bcd50a75663174b575f22",
              "versionType": "git"
            },
            {
              "lessThan": "6c25bf4e44a2b6a14332f952bba0974521f5b72d",
              "status": "affected",
              "version": "1a8c64e110435e44e71bcd50a75663174b575f22",
              "versionType": "git"
            },
            {
              "lessThan": "bc3dd82a0ffd488bb902f4c69c3d28fd4088d973",
              "status": "affected",
              "version": "1a8c64e110435e44e71bcd50a75663174b575f22",
              "versionType": "git"
            },
            {
              "lessThan": "059ac6252a63edf1cea79bf30bd860a8c264b62c",
              "status": "affected",
              "version": "1a8c64e110435e44e71bcd50a75663174b575f22",
              "versionType": "git"
            },
            {
              "lessThan": "a2b8d7827f48ee54a686cb80e4a1d0ff954ec42a",
              "status": "affected",
              "version": "1a8c64e110435e44e71bcd50a75663174b575f22",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/base/memory.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "lessThan": "6.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.144",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.95",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.37",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "EB06F04F-FCFC-49B0-8B6C-FE1EA3A596E1",
              "versionEndExcluding": "6.6.144",
              "versionStartIncluding": "6.6",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4E206B86-E0E3-4394-A93F-39F2D50A8AA8",
              "versionEndExcluding": "6.12.95",
              "versionStartIncluding": "6.7",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E08ACB05-518A-4D61-A6C4-268D1BB6BF46",
              "versionEndExcluding": "6.18.37",
              "versionStartIncluding": "6.13",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6241DF06-E6F3-4B61-B5A2-A60F2AE5B982",
              "versionEndExcluding": "7.0.14",
              "versionStartIncluding": "6.19",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C18FAA06-B61A-4036-A12D-F06F5135E64B",
              "versionEndExcluding": "7.1.2",
              "versionStartIncluding": "7.1",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers/base/memory: set mem-\u003ealtmap after successful device registration\n\nIf __add_memory_block() fails at xa_store() (under memory pressure for\nexample), device_unregister() is called, which eventually triggers\nmemory_block_release() with mem-\u003ealtmap still set, causing a\nWARN_ON(mem-\u003ealtmap).  This was triggered by modifying virtio-mem driver.\n\nFix this by delaying the assignment of mem-\u003ealtmap until after\n__add_memory_block() has succeeded."
    }
  ],
  "id": "CVE-2026-64244",
  "lastModified": "2026-08-17T19:25:13.990",
  "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"
      }
    ]
  },
  "published": "2026-07-24T16:16:53.803",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/059ac6252a63edf1cea79bf30bd860a8c264b62c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/22dc0d042f02ce82aa61422ea5f232628bfd9e9c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/6c25bf4e44a2b6a14332f952bba0974521f5b72d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/802e113cf120df7208e4c7e604950a85e87120a8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/a2b8d7827f48ee54a686cb80e4a1d0ff954ec42a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/bc3dd82a0ffd488bb902f4c69c3d28fd4088d973"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-64244 (GCVE-0-2026-64244)

Vulnerability from cvelistv5 – Published: 2026-07-24 15:29 – Updated: 2026-08-17 04:51

Title

drivers/base/memory: set mem->altmap after successful device registration

Summary

Severity

No CVSS data available.

Assigner

Linux

References

6 references

URL	Tags
https://git.kernel.org/stable/c/802e113cf120df720…
https://git.kernel.org/stable/c/22dc0d042f02ce82a…
https://git.kernel.org/stable/c/6c25bf4e44a2b6a14…
https://git.kernel.org/stable/c/bc3dd82a0ffd488bb…
https://git.kernel.org/stable/c/059ac6252a63edf1c…
https://git.kernel.org/stable/c/a2b8d7827f48ee54a…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1a8c64e110435e44e71bcd50a75663174b575f22 , < 802e113cf120df7208e4c7e604950a85e87120a8 (git) Affected: 1a8c64e110435e44e71bcd50a75663174b575f22 , < 22dc0d042f02ce82aa61422ea5f232628bfd9e9c (git) Affected: 1a8c64e110435e44e71bcd50a75663174b575f22 , < 6c25bf4e44a2b6a14332f952bba0974521f5b72d (git) Affected: 1a8c64e110435e44e71bcd50a75663174b575f22 , < bc3dd82a0ffd488bb902f4c69c3d28fd4088d973 (git) Affected: 1a8c64e110435e44e71bcd50a75663174b575f22 , < 059ac6252a63edf1cea79bf30bd860a8c264b62c (git) Affected: 1a8c64e110435e44e71bcd50a75663174b575f22 , < a2b8d7827f48ee54a686cb80e4a1d0ff954ec42a (git)
Linux	Linux	Affected: 6.6 Unaffected: 0 , < 6.6 (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.37 , ≤ 6.18.* (semver) Unaffected: 7.0.14 , ≤ 7.0.* (semver) Unaffected: 7.1.2 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/base/memory.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "802e113cf120df7208e4c7e604950a85e87120a8",
              "status": "affected",
              "version": "1a8c64e110435e44e71bcd50a75663174b575f22",
              "versionType": "git"
            },
            {
              "lessThan": "22dc0d042f02ce82aa61422ea5f232628bfd9e9c",
              "status": "affected",
              "version": "1a8c64e110435e44e71bcd50a75663174b575f22",
              "versionType": "git"
            },
            {
              "lessThan": "6c25bf4e44a2b6a14332f952bba0974521f5b72d",
              "status": "affected",
              "version": "1a8c64e110435e44e71bcd50a75663174b575f22",
              "versionType": "git"
            },
            {
              "lessThan": "bc3dd82a0ffd488bb902f4c69c3d28fd4088d973",
              "status": "affected",
              "version": "1a8c64e110435e44e71bcd50a75663174b575f22",
              "versionType": "git"
            },
            {
              "lessThan": "059ac6252a63edf1cea79bf30bd860a8c264b62c",
              "status": "affected",
              "version": "1a8c64e110435e44e71bcd50a75663174b575f22",
              "versionType": "git"
            },
            {
              "lessThan": "a2b8d7827f48ee54a686cb80e4a1d0ff954ec42a",
              "status": "affected",
              "version": "1a8c64e110435e44e71bcd50a75663174b575f22",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/base/memory.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "lessThan": "6.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.144",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.95",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.37",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.144",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.95",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.37",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.14",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.2",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers/base/memory: set mem-\u003ealtmap after successful device registration\n\nIf __add_memory_block() fails at xa_store() (under memory pressure for\nexample), device_unregister() is called, which eventually triggers\nmemory_block_release() with mem-\u003ealtmap still set, causing a\nWARN_ON(mem-\u003ealtmap).  This was triggered by modifying virtio-mem driver.\n\nFix this by delaying the assignment of mem-\u003ealtmap until after\n__add_memory_block() has succeeded."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T04:51:55.230Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/802e113cf120df7208e4c7e604950a85e87120a8"
        },
        {
          "url": "https://git.kernel.org/stable/c/22dc0d042f02ce82aa61422ea5f232628bfd9e9c"
        },
        {
          "url": "https://git.kernel.org/stable/c/6c25bf4e44a2b6a14332f952bba0974521f5b72d"
        },
        {
          "url": "https://git.kernel.org/stable/c/bc3dd82a0ffd488bb902f4c69c3d28fd4088d973"
        },
        {
          "url": "https://git.kernel.org/stable/c/059ac6252a63edf1cea79bf30bd860a8c264b62c"
        },
        {
          "url": "https://git.kernel.org/stable/c/a2b8d7827f48ee54a686cb80e4a1d0ff954ec42a"
        }
      ],
      "title": "drivers/base/memory: set mem-\u003ealtmap after successful device registration",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64244",
    "datePublished": "2026-07-24T15:29:59.891Z",
    "dateReserved": "2026-07-19T15:36:31.772Z",
    "dateUpdated": "2026-08-17T04:51:55.230Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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.

Action not permitted

FKIE_CVE-2026-64244

CVE-2026-64244 (GCVE-0-2026-64244)

Tags

Sightings

Nomenclature