Vulnerability-Lookup

GHSA-26RF-29MW-GF9H

Vulnerability from github – Published: 2026-05-27 15:33 – Updated: 2026-05-27 15:33

Details

In the Linux kernel, the following vulnerability has been resolved:

of: unittest: fix use-after-free in testdrv_probe()

The function testdrv_probe() retrieves the device_node from the PCI device, applies an overlay, and then immediately calls of_node_put(dn). This releases the reference held by the PCI core, potentially freeing the node if the reference count drops to zero. Later, the same freed pointer 'dn' is passed to of_platform_default_populate(), leading to a use-after-free.

The reference to pdev->dev.of_node is owned by the device model and should not be released by the driver. Remove the erroneous of_node_put() to prevent premature freeing.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-45989"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:17:16Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nof: unittest: fix use-after-free in testdrv_probe()\n\nThe function testdrv_probe() retrieves the device_node from the PCI\ndevice, applies an overlay, and then immediately calls of_node_put(dn).\nThis releases the reference held by the PCI core, potentially freeing\nthe node if the reference count drops to zero. Later, the same freed\npointer \u0027dn\u0027 is passed to of_platform_default_populate(), leading to a\nuse-after-free.\n\nThe reference to pdev-\u003edev.of_node is owned by the device model and\nshould not be released by the driver. Remove the erroneous of_node_put()\nto prevent premature freeing.",
  "id": "GHSA-26rf-29mw-gf9h",
  "modified": "2026-05-27T15:33:19Z",
  "published": "2026-05-27T15:33:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45989"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/07fd339b2c253205794bea5d9b4b7548a4546c56"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0ba03e06f037df704d9b032e36d417633e2326bc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5b6122a67a295f8a08b7c18d908a1bd974dfaec8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6b2023286d2c6ed3bf964fb92e34c9c14d42eb69"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d68347b07b9801791c9eaab8f772770b52b8cd5c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-45989 (GCVE-0-2026-45989)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:55 – Updated: 2026-05-27 12:55

Title

of: unittest: fix use-after-free in testdrv_probe()

Summary

In the Linux kernel, the following vulnerability has been resolved: of: unittest: fix use-after-free in testdrv_probe() The function testdrv_probe() retrieves the device_node from the PCI device, applies an overlay, and then immediately calls of_node_put(dn). This releases the reference held by the PCI core, potentially freeing the node if the reference count drops to zero. Later, the same freed pointer 'dn' is passed to of_platform_default_populate(), leading to a use-after-free. The reference to pdev->dev.of_node is owned by the device model and should not be released by the driver. Remove the erroneous of_node_put() to prevent premature freeing.

Severity

No CVSS data available.

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/0ba03e06f037df704…
https://git.kernel.org/stable/c/d68347b07b9801791…
https://git.kernel.org/stable/c/5b6122a67a295f8a0…
https://git.kernel.org/stable/c/6b2023286d2c6ed3b…
https://git.kernel.org/stable/c/07fd339b2c2532057…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 26409dd045892904b059dc411403e9c8ce7543ca , < 0ba03e06f037df704d9b032e36d417633e2326bc (git) Affected: 26409dd045892904b059dc411403e9c8ce7543ca , < d68347b07b9801791c9eaab8f772770b52b8cd5c (git) Affected: 26409dd045892904b059dc411403e9c8ce7543ca , < 5b6122a67a295f8a08b7c18d908a1bd974dfaec8 (git) Affected: 26409dd045892904b059dc411403e9c8ce7543ca , < 6b2023286d2c6ed3bf964fb92e34c9c14d42eb69 (git) Affected: 26409dd045892904b059dc411403e9c8ce7543ca , < 07fd339b2c253205794bea5d9b4b7548a4546c56 (git)
Linux	Linux	Affected: 6.6 Unaffected: 0 , < 6.6 (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.86 , ≤ 6.12.* (semver) Unaffected: 6.18.27 , ≤ 6.18.* (semver) Unaffected: 7.0.4 , ≤ 7.0.* (semver) Unaffected: 7.1-rc1 , ≤ * (original_commit_for_fix)

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/of/unittest.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "d68347b07b9801791c9eaab8f772770b52b8cd5c",
              "status": "affected",
              "version": "26409dd045892904b059dc411403e9c8ce7543ca",
              "versionType": "git"
            },
            {
              "lessThan": "5b6122a67a295f8a08b7c18d908a1bd974dfaec8",
              "status": "affected",
              "version": "26409dd045892904b059dc411403e9c8ce7543ca",
              "versionType": "git"
            },
            {
              "lessThan": "6b2023286d2c6ed3bf964fb92e34c9c14d42eb69",
              "status": "affected",
              "version": "26409dd045892904b059dc411403e9c8ce7543ca",
              "versionType": "git"
            },
            {
              "lessThan": "07fd339b2c253205794bea5d9b4b7548a4546c56",
              "status": "affected",
              "version": "26409dd045892904b059dc411403e9c8ce7543ca",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/of/unittest.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": "6.6.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.86",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.27",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.140",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.86",
                  "versionStartIncluding": "6.6",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.27",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.4",
                  "versionStartIncluding": "6.6",
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                },
                {
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                }
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nof: unittest: fix use-after-free in testdrv_probe()\n\nThe function testdrv_probe() retrieves the device_node from the PCI\ndevice, applies an overlay, and then immediately calls of_node_put(dn).\nThis releases the reference held by the PCI core, potentially freeing\nthe node if the reference count drops to zero. Later, the same freed\npointer \u0027dn\u0027 is passed to of_platform_default_populate(), leading to a\nuse-after-free.\n\nThe reference to pdev-\u003edev.of_node is owned by the device model and\nshould not be released by the driver. Remove the erroneous of_node_put()\nto prevent premature freeing."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T12:55:41.276Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0ba03e06f037df704d9b032e36d417633e2326bc"
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          "url": "https://git.kernel.org/stable/c/5b6122a67a295f8a08b7c18d908a1bd974dfaec8"
        },
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          "url": "https://git.kernel.org/stable/c/6b2023286d2c6ed3bf964fb92e34c9c14d42eb69"
        },
        {
          "url": "https://git.kernel.org/stable/c/07fd339b2c253205794bea5d9b4b7548a4546c56"
        }
      ],
      "title": "of: unittest: fix use-after-free in testdrv_probe()",
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        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-45989",
    "datePublished": "2026-05-27T12:55:41.276Z",
    "dateReserved": "2026-05-13T15:03:33.091Z",
    "dateUpdated": "2026-05-27T12:55:41.276Z",
    "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.

Action not permitted

GHSA-26RF-29MW-GF9H

CVE-2026-45989 (GCVE-0-2026-45989)

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Sightings

Nomenclature