CVE-2026-64220 (GCVE-0-2026-64220)

Vulnerability from cvelistv5 – Published: 2026-07-24 15:23 – Updated: 2026-11-06 16:34
VLAI
Title
device property: set fwnode->secondary to NULL in fwnode_init()
Summary
In the Linux kernel, the following vulnerability has been resolved: device property: set fwnode->secondary to NULL in fwnode_init() If a firmware node is allocated on the stack (for instance: temporary software node whose life-time we control) or on the heap - but using a non-zeroing allocation function - and initialized using fwnode_init(), its secondary pointer will contain uninitalized memory which likely will be neither NULL nor IS_ERR() and so may end up being dereferenced (for example: in dev_to_swnode()). Set fwnode->secondary to NULL on initialization.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-06 16:32 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6642 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 01bb86b380a306bd937c96da36f66429f3362137 , < f0e211d6539fae800217c10797993b7592d6ab01 (git)
Affected: 01bb86b380a306bd937c96da36f66429f3362137 , < 3f1024deeab3b5443c29b3de4fe475e87309b8fa (git)
Affected: 01bb86b380a306bd937c96da36f66429f3362137 , < 371f53925a6714d0aa35f1aefdffc3e8cd62f480 (git)
Affected: 01bb86b380a306bd937c96da36f66429f3362137 , < 34bf74b1fd2e4a44e27821a329204caf09df2976 (git)
Affected: 01bb86b380a306bd937c96da36f66429f3362137 , < 508fd8ab158abd04b7f7d0f707cd6d6c405df4ea (git)
Affected: 01bb86b380a306bd937c96da36f66429f3362137 , < f59e686c778cb41b8f7aa8fab2afd6a01afb3d47 (git)
Affected: 01bb86b380a306bd937c96da36f66429f3362137 , < 215c90ee656114f5e8c32408228d97082f8e0eef (git)
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Linux Linux Affected: 5.11
Unaffected: 0 , < 5.11 (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.142 , ≤ 6.6.* (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)
guessed Create a notification for this product.
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-908"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-11-06T04:45:27+00:00",
      "cve": "CVE-2026-64220",
      "id": "CVE-2026-64220",
      "initial_release_date": "2026-07-24T00:00:00+00:00",
      "product_status:known_affected": "158",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: device property: set fwnode-\u003esecondary to NULL in fwnode_init()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64220.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-64220",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-11-06T16:32:20.807519Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-11-06T16:32:21.800Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "include/linux/fwnode.h"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "f0e211d6539fae800217c10797993b7592d6ab01",
                  "status": "affected",
                  "version": "01bb86b380a306bd937c96da36f66429f3362137",
                  "versionType": "git"
                },
                {
                  "lessThan": "3f1024deeab3b5443c29b3de4fe475e87309b8fa",
                  "status": "affected",
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                  "versionType": "git"
                },
                {
                  "lessThan": "371f53925a6714d0aa35f1aefdffc3e8cd62f480",
                  "status": "affected",
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                  "versionType": "git"
                },
                {
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                  "versionType": "git"
                },
                {
                  "lessThan": "508fd8ab158abd04b7f7d0f707cd6d6c405df4ea",
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                  "versionType": "git"
                },
                {
                  "lessThan": "f59e686c778cb41b8f7aa8fab2afd6a01afb3d47",
                  "status": "affected",
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                  "versionType": "git"
                },
                {
                  "lessThan": "215c90ee656114f5e8c32408228d97082f8e0eef",
                  "status": "affected",
                  "version": "01bb86b380a306bd937c96da36f66429f3362137",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "include/linux/fwnode.h"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "5.11"
                },
                {
                  "lessThan": "5.11",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.209",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.175",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.6.*",
                  "status": "unaffected",
                  "version": "6.6.142",
                  "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": "5.15.209",
                      "versionStartIncluding": "5.11",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.175",
                      "versionStartIncluding": "5.11",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.6.142",
                      "versionStartIncluding": "5.11",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.12.92",
                      "versionStartIncluding": "5.11",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.18.34",
                      "versionStartIncluding": "5.11",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "7.0.11",
                      "versionStartIncluding": "5.11",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "7.1",
                      "versionStartIncluding": "5.11",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndevice property: set fwnode-\u003esecondary to NULL in fwnode_init()\n\nIf a firmware node is allocated on the stack (for instance: temporary\nsoftware node whose life-time we control) or on the heap - but using a\nnon-zeroing allocation function - and initialized using fwnode_init(),\nits secondary pointer will contain uninitalized memory which likely will\nbe neither NULL nor IS_ERR() and so may end up being dereferenced (for\nexample: in dev_to_swnode()). Set fwnode-\u003esecondary to NULL on\ninitialization."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-07-24T15:23:06.931Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/f0e211d6539fae800217c10797993b7592d6ab01"
            },
            {
              "url": "https://git.kernel.org/stable/c/3f1024deeab3b5443c29b3de4fe475e87309b8fa"
            },
            {
              "url": "https://git.kernel.org/stable/c/371f53925a6714d0aa35f1aefdffc3e8cd62f480"
            },
            {
              "url": "https://git.kernel.org/stable/c/34bf74b1fd2e4a44e27821a329204caf09df2976"
            },
            {
              "url": "https://git.kernel.org/stable/c/508fd8ab158abd04b7f7d0f707cd6d6c405df4ea"
            },
            {
              "url": "https://git.kernel.org/stable/c/f59e686c778cb41b8f7aa8fab2afd6a01afb3d47"
            },
            {
              "url": "https://git.kernel.org/stable/c/215c90ee656114f5e8c32408228d97082f8e0eef"
            }
          ],
          "title": "device property: set fwnode-\u003esecondary to NULL in fwnode_init()",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2026-64220",
        "datePublished": "2026-07-24T15:23:06.931Z",
        "dateReserved": "2026-07-19T15:36:31.770Z",
        "dateUpdated": "2026-11-06T16:34:30.235Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Sightings

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Nomenclature

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  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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