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GHSA-5J9P-C334-FVCP

Vulnerability from github – Published: 2026-06-08 18:31 – Updated: 2026-06-14 06:30

Details

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

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

The variable 'parent' is assigned the value of 'nchangeset' earlier in the function, meaning both point to the same struct device_node. The call to of_node_put(nchangeset) can decrement the reference count to zero and free the node if there are no other holders. After that, the code still uses 'parent' to check for the presence of a property and to read a string property, leading to a use-after-free.

Fix this by moving the of_node_put() call after the last access to 'parent', avoiding the UAF.

Severity

8.4 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-46288"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-08T17:16:46Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nof: unittest: fix use-after-free in of_unittest_changeset()\n\nThe variable \u0027parent\u0027 is assigned the value of \u0027nchangeset\u0027 earlier in the\nfunction, meaning both point to the same struct device_node. The call to\nof_node_put(nchangeset) can decrement the reference count to zero and\nfree the node if there are no other holders. After that, the code still\nuses \u0027parent\u0027 to check for the presence of a property and to read a\nstring property, leading to a use-after-free.\n\nFix this by moving the of_node_put() call after the last access to\n\u0027parent\u0027, avoiding the UAF.",
  "id": "GHSA-5j9p-c334-fvcp",
  "modified": "2026-06-14T06:30:23Z",
  "published": "2026-06-08T18:31:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46288"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/37318d1a27c9cc5a70d3cd7e49e30ec86f2b8ca1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6fdad20b7975bdc32e85b45f8f7c640f6687b81f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7f0f0926f3010b10cff5e93446258f971e42f2fd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/faecdd423c27f0d6090156a435ba9dbbac0eaddb"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-46288 (GCVE-0-2026-46288)

Vulnerability from cvelistv5 – Published: 2026-06-08 15:41 – Updated: 2026-08-05 12:31

Title

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

Summary

In the Linux kernel, the following vulnerability has been resolved: of: unittest: fix use-after-free in of_unittest_changeset() The variable 'parent' is assigned the value of 'nchangeset' earlier in the function, meaning both point to the same struct device_node. The call to of_node_put(nchangeset) can decrement the reference count to zero and free the node if there are no other holders. After that, the code still uses 'parent' to check for the presence of a property and to read a string property, leading to a use-after-free. Fix this by moving the of_node_put() call after the last access to 'parent', avoiding the UAF.

Severity

8.4 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/37318d1a27c9cc5a7…
https://git.kernel.org/stable/c/7f0f0926f3010b10c…
https://git.kernel.org/stable/c/6fdad20b7975bdc32…
https://git.kernel.org/stable/c/faecdd423c27f0d60…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1c668ea65506e67ce2eae07b69bb09fcdd86e309 , < 37318d1a27c9cc5a70d3cd7e49e30ec86f2b8ca1 (git) Affected: 1c668ea65506e67ce2eae07b69bb09fcdd86e309 , < 7f0f0926f3010b10cff5e93446258f971e42f2fd (git) Affected: 1c668ea65506e67ce2eae07b69bb09fcdd86e309 , < 6fdad20b7975bdc32e85b45f8f7c640f6687b81f (git) Affected: 1c668ea65506e67ce2eae07b69bb09fcdd86e309 , < faecdd423c27f0d6090156a435ba9dbbac0eaddb (git)
Linux	Linux	Affected: 6.12 Unaffected: 0 , < 6.12 (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 , ≤ * (original_commit_for_fix)

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{
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      "affected": [
        {
          "defaultStatus": "unaffected",
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          "programFiles": [
            "drivers/of/unittest.c"
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          "vendor": "Linux",
          "versions": [
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              "lessThan": "37318d1a27c9cc5a70d3cd7e49e30ec86f2b8ca1",
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              "versionType": "git"
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          "vendor": "Linux",
          "versions": [
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              "version": "6.12"
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              "status": "unaffected",
              "version": "0",
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              "status": "unaffected",
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            },
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              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "7.0.4",
              "versionType": "semver"
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              "lessThanOrEqual": "*",
              "status": "unaffected",
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          "nodes": [
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              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.86",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nof: unittest: fix use-after-free in of_unittest_changeset()\n\nThe variable \u0027parent\u0027 is assigned the value of \u0027nchangeset\u0027 earlier in the\nfunction, meaning both point to the same struct device_node. The call to\nof_node_put(nchangeset) can decrement the reference count to zero and\nfree the node if there are no other holders. After that, the code still\nuses \u0027parent\u0027 to check for the presence of a property and to read a\nstring property, leading to a use-after-free.\n\nFix this by moving the of_node_put() call after the last access to\n\u0027parent\u0027, avoiding the UAF."
        }
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            "version": "3.1"
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          "scenarios": [
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              "value": "AV:L - The vulnerable code runs only during late_initcall boot self-tests in drivers/of/unittest.c; reaching it requires local ability to build and boot a kernel with CONFIG_OF_UNITTEST enabled, with no network, syscall, or ioctl runtime path.\nAC:L - Once the unittest kernel boots, the UAF triggers deterministically after of_changeset_revert() when of_node_put() drops the sole reference; no race or attacker-uncontrolled memory layout is required.\nPR:N - Exploitation does not require privileges on a running production system\u2014only booting a specially built unittest kernel\u2014so no authenticated local user or namespace capability on the target image is needed.\nUI:N - The unittest executes automatically during kernel initialization after testcase DT data is attached; no additional victim interaction beyond booting the test configuration is required.\nS:U - The UAF corrupts kernel heap memory during in-kernel device-tree self-tests and does not cross VM, sandbox, or IOMMU security boundaries.\nC:H - After of_node_put() frees the device_node, of_property_present() and of_property_read_string() dereference freed memory, enabling kernel information disclosure from attacker-influencable freed heap contents.\nI:H - Use-after-free on a struct device_node in kernel heap can be leveraged for memory corruption and arbitrary kernel code execution via heap grooming, not merely a bounded write.\nA:H - Dereferencing a freed device_node during property lookups can cause kernel oops, BUG, or panic during boot-time unittest execution."
            }
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        },
        {
          "url": "https://git.kernel.org/stable/c/faecdd423c27f0d6090156a435ba9dbbac0eaddb"
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      ],
      "title": "of: unittest: fix use-after-free in of_unittest_changeset()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46288",
    "datePublished": "2026-06-08T15:41:31.868Z",
    "dateReserved": "2026-05-13T15:03:33.110Z",
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    "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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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