Vulnerability-Lookup

GHSA-W8C6-QH9V-M8G2

Vulnerability from github – Published: 2026-09-11 21:31 – Updated: 2026-09-14 15:32

Details

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

regulator: as3722_get_regulator_dt_data: fix premature of_node_put leaving dangling of_node pointer

In as3722_get_regulator_dt_data(), of_get_child_by_name() acquires a reference on np, which is then assigned to pdev->dev.of_node. The function immediately calls of_node_put(np), releasing the reference and leaving pdev->dev.of_node as a dangling pointer.

Remove the of_node_put(np) call to let the device hold the reference.

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-2026-89504"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-11T20:19:32Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nregulator: as3722_get_regulator_dt_data: fix premature of_node_put leaving dangling of_node pointer\n\nIn as3722_get_regulator_dt_data(), of_get_child_by_name() acquires a\nreference on np, which is then assigned to pdev-\u003edev.of_node. The\nfunction immediately calls of_node_put(np), releasing the reference and\nleaving pdev-\u003edev.of_node as a dangling pointer.\n\nRemove the of_node_put(np) call to let the device hold the reference.",
  "id": "GHSA-w8c6-qh9v-m8g2",
  "modified": "2026-09-14T15:32:27Z",
  "published": "2026-09-11T21:31:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89504"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0bde4f140e90f87ebd49cd9c884c4bb3f19fe931"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8648e29e5c01b6b677c704049189287e27255ccb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/95342d26f9c6b68a46ab57fa48428a3c4a423dd7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bd5606e9da1a01a61c7d2f5df36243414a0142be"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d3c1316d84e0a036890b00ae6e4c0b0b80f70c25"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d9b1407477fb736978b04108073180ca84958936"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eda08b6bd64f01ca9defbfcc9e0c3e30f46cfc02"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f9324d670ae0b88cbfb0aa48fcaefa5baeb8da4c"
    }
  ],
  "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-2026-89504 (GCVE-0-2026-89504)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:43 – Updated: 2026-09-14 12:00

Title

regulator: as3722_get_regulator_dt_data: fix premature of_node_put leaving dangling of_node pointer

Summary

In the Linux kernel, the following vulnerability has been resolved: regulator: as3722_get_regulator_dt_data: fix premature of_node_put leaving dangling of_node pointer In as3722_get_regulator_dt_data(), of_get_child_by_name() acquires a reference on np, which is then assigned to pdev->dev.of_node. The function immediately calls of_node_put(np), releasing the reference and leaving pdev->dev.of_node as a dangling pointer. Remove the of_node_put(np) call to let the device hold the reference.

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

8 references

URL	Tags
https://git.kernel.org/stable/c/d9b1407477fb73697…
https://git.kernel.org/stable/c/bd5606e9da1a01a61…
https://git.kernel.org/stable/c/0bde4f140e90f87eb…
https://git.kernel.org/stable/c/eda08b6bd64f01ca9…
https://git.kernel.org/stable/c/d3c1316d84e0a0368…
https://git.kernel.org/stable/c/95342d26f9c6b68a4…
https://git.kernel.org/stable/c/8648e29e5c01b6b67…
https://git.kernel.org/stable/c/f9324d670ae0b88cb…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: bc407334e9a6a745de5360395282beb2690adf48 , < d9b1407477fb736978b04108073180ca84958936 (git) Affected: bc407334e9a6a745de5360395282beb2690adf48 , < bd5606e9da1a01a61c7d2f5df36243414a0142be (git) Affected: bc407334e9a6a745de5360395282beb2690adf48 , < 0bde4f140e90f87ebd49cd9c884c4bb3f19fe931 (git) Affected: bc407334e9a6a745de5360395282beb2690adf48 , < eda08b6bd64f01ca9defbfcc9e0c3e30f46cfc02 (git) Affected: bc407334e9a6a745de5360395282beb2690adf48 , < d3c1316d84e0a036890b00ae6e4c0b0b80f70c25 (git) Affected: bc407334e9a6a745de5360395282beb2690adf48 , < 95342d26f9c6b68a46ab57fa48428a3c4a423dd7 (git) Affected: bc407334e9a6a745de5360395282beb2690adf48 , < 8648e29e5c01b6b677c704049189287e27255ccb (git) Affected: bc407334e9a6a745de5360395282beb2690adf48 , < f9324d670ae0b88cbfb0aa48fcaefa5baeb8da4c (git)
Linux	Linux	Affected: 3.13 Unaffected: 0 , < 3.13 (semver) Unaffected: 5.10.270 , ≤ 5.10.* (semver) Unaffected: 5.15.221 , ≤ 5.15.* (semver) Unaffected: 6.1.188 , ≤ 6.1.* (semver) Unaffected: 6.6.157 , ≤ 6.6.* (semver) Unaffected: 6.12.109 , ≤ 6.12.* (semver) Unaffected: 6.18.50 , ≤ 6.18.* (semver) Unaffected: 7.2.4 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/regulator/as3722-regulator.c"
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          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
            },
            {
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            },
            {
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              "status": "affected",
              "version": "bc407334e9a6a745de5360395282beb2690adf48",
              "versionType": "git"
            },
            {
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              "versionType": "git"
            },
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              "status": "affected",
              "version": "bc407334e9a6a745de5360395282beb2690adf48",
              "versionType": "git"
            },
            {
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              "version": "bc407334e9a6a745de5360395282beb2690adf48",
              "versionType": "git"
            },
            {
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          "vendor": "Linux",
          "versions": [
            {
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              "version": "3.13"
            },
            {
              "lessThan": "3.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.109",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.221",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                {
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                {
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                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nregulator: as3722_get_regulator_dt_data: fix premature of_node_put leaving dangling of_node pointer\n\nIn as3722_get_regulator_dt_data(), of_get_child_by_name() acquires a\nreference on np, which is then assigned to pdev-\u003edev.of_node. The\nfunction immediately calls of_node_put(np), releasing the reference and\nleaving pdev-\u003edev.of_node as a dangling pointer.\n\nRemove the of_node_put(np) call to let the device hold the reference."
        }
      ],
      "metrics": [
        {
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The dangling of_node is created only on the local as3722-regulator platform probe path (I2C MFD as3722_i2c_probe \u2192 mfd_add_devices \u2192 as3722_regulator_probe \u2192 as3722_get_regulator_dt_data); the onboard AMS AS3722 PMIC is not reached via network packets, Bluetooth, or USB enumeration.\nAC:L - On affected Tegra boards the required regulators DT child exists, so of_get_child_by_name() then the premature of_node_put() runs deterministically at every probe with no race; with OF_OVERLAY (arm64 defconfig) the node can be freed while the device still holds the pointer.\nPR:N - tegra_defconfig builds MFD_AS3722 and REGULATOR_AS3722 in, so the vulnerable probe runs automatically at boot on Chromebooks (nyan), Jetson TK1, Toradex Apalis, and similar embedded systems with no capability check; an attacker only needs to power-cycle a shared kiosk or device.\nUI:N - Driver initialization and the of_node_put() run unattended during kernel boot on affected hardware; no victim action such as mounting a filesystem, opening a device, or plugging in USB is required.\nS:U - The use-after-free corrupts kernel device_node/kobject memory on the host; AS3722 is a board PMIC regulator driver and does not cross a VM, IOMMU, or other security-authority boundary.\nC:H - The premature of_node_put() leaves pdev-\u003edev.of_node dangling; a later put on device release or DT overlay teardown can free the device_node while the driver and OF core still use it, enabling reads of reallocated slab memory.\nI:H - Use-after-free of the device_node heap object (kobject, fwnode, property and parent/child links) can be turned into an arbitrary write and control-flow hijack via heap reuse, matching scoring guidance that UAF is Integrity High.\nA:H - Dereferencing the dangling of_node during regulator registration, sysfs, overlay removal, or platform_device_release() can oops or panic the kernel, including at boot on systems where AS3722 supplies CPU and core rails."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-14T12:00:34.265Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/eda08b6bd64f01ca9defbfcc9e0c3e30f46cfc02"
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        {
          "url": "https://git.kernel.org/stable/c/8648e29e5c01b6b677c704049189287e27255ccb"
        },
        {
          "url": "https://git.kernel.org/stable/c/f9324d670ae0b88cbfb0aa48fcaefa5baeb8da4c"
        }
      ],
      "title": "regulator: as3722_get_regulator_dt_data: fix premature of_node_put leaving dangling of_node pointer",
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89504",
    "datePublished": "2026-09-11T19:43:52.024Z",
    "dateReserved": "2026-09-11T19:38:34.715Z",
    "dateUpdated": "2026-09-14T12:00:34.265Z",
    "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.

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GHSA-W8C6-QH9V-M8G2

CVE-2026-89504 (GCVE-0-2026-89504)

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Nomenclature