CVE-2026-89744

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: device property: fix infinite loop in fwnode_for_each_child_node() When iterate over children of a fwnode that has a secondary fwnode, fwnode_get_next_child_node() can enter an infinite loop if the secondary fwnode has more than one child. Parent Child (Primary fwnode) FWa: {FWa1, FWa2, FWa3} (Secondary fwnode) FWb: {FWb1, FWb2} In this case: ┌─> fwnode_get_next_child_node(FWa, FWa1) │ - fwnode_call_ptr_op(FWa, get_next_child_node, FWa1) returns FWa2 │ │ ... │ │ fwnode_get_next_child_node(FWa, FWa3) │ - fwnode_call_ptr_op(FWa, get_next_child_node, FWa3) returns NULL │ - fwnode_call_ptr_op(FWb, get_next_child_node, FWa3) returns FWb1 │ │ fwnode_get_next_child_node(FWa, FWb1) │ - fwnode_call_ptr_op(FWa, get_next_child_node, FWb1) returns FWa1 └────┘ This cause fwnode_for_each_child_node() to loop indefinitely, reapeatedly output {FWa1, FWa2, FWa3, FWb1, FWa1, ...}. The root cause is that when the current child (FWb1) belongs to the secondary fwnode, calling get_next_child_node() on the parimary fwnode incorrectly returns the first child (FWa1) again instead of NULL. Fix this by dynamically checking the parent fwnode of the current child before calling get_next_child_node(). This approach follows the pattern established in commit b5b41ab6b0c1 ("device property: Check fwnode->secondary in fwnode_graph_get_next_endpoint()").

Severity

HIGH

CVSS score

8.4 (v3.1)

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-09-11 20:20:05.113000

Last modified

2026-10-30 13:20:28.023000

View original CVE JSON

{
  "id": "CVE-2026-89744",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-11T20:20:05.113",
  "lastModified": "2026-10-30T13:20:28.023",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndevice property: fix infinite loop in fwnode_for_each_child_node()\n\nWhen iterate over children of a fwnode that has a secondary fwnode,\nfwnode_get_next_child_node() can enter an infinite loop if the secondary\nfwnode has more than one child.\n\n                       Parent        Child\n      (Primary fwnode)   FWa:   {FWa1, FWa2, FWa3}\n    (Secondary fwnode)   FWb:   {FWb1, FWb2}\n\nIn this case:\n\n ┌─> fwnode_get_next_child_node(FWa, FWa1)\n │    - fwnode_call_ptr_op(FWa, get_next_child_node, FWa1) returns FWa2\n │\n │   ...\n │\n │   fwnode_get_next_child_node(FWa, FWa3)\n │    - fwnode_call_ptr_op(FWa, get_next_child_node, FWa3) returns NULL\n │    - fwnode_call_ptr_op(FWb, get_next_child_node, FWa3) returns FWb1\n │\n │   fwnode_get_next_child_node(FWa, FWb1)\n │    - fwnode_call_ptr_op(FWa, get_next_child_node, FWb1) returns FWa1\n └────┘\n\nThis cause fwnode_for_each_child_node() to loop indefinitely, reapeatedly\noutput {FWa1, FWa2, FWa3, FWb1, FWa1, ...}.\n\nThe root cause is that when the current child (FWb1) belongs to the\nsecondary fwnode, calling get_next_child_node() on the parimary fwnode\nincorrectly returns the first child (FWa1) again instead of NULL.\n\nFix this by dynamically checking the parent fwnode of the current child\nbefore calling get_next_child_node(). This approach follows the pattern\nestablished in commit b5b41ab6b0c1 (\"device property: Check\nfwnode->secondary in fwnode_graph_get_next_endpoint()\")."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/base/property.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "d1370a4f2aa0d811d419f6a6c6d257867d608956",
              "lessThan": "45a8fc4a12751833ed3868095d18200a85336760",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "5b51b2ba5207e07bcd7be0daab2f8eea405e005e",
              "lessThan": "770c9bde93c8bb644f590743e9fbae3492a20f9e",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "272fcf19fda14ec603ce915aafc56cb3ea2fb38d",
              "lessThan": "04004fa33730031392d987a9c1bbd8a0e1c4794b",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "3cfdf8d27b668d122a67a14bf2bcde1a7f10bbd6",
              "lessThan": "f4ae79b5f00130aacaddb1f3eb2e5ef711fbf9e0",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "64dc258f9eec1d7204e9879cb836fe29967f1239",
              "lessThan": "20ed517e416df89448029293304c9e180c26cd4b",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "32752c3e81498b106da64a141379eb94f493fe6f",
              "lessThan": "ba69d892ff4e4a58cc12a2cae106b112db3306cc",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "2692c614f8f05929d692b3dbfd3faef1f00fbaf0",
              "lessThan": "9cb6b223ef02cb5c9777a852ae1ecf5796987eb6",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "2692c614f8f05929d692b3dbfd3faef1f00fbaf0",
              "lessThan": "1900692555826753adab8799a1a8d50bb1ee200c",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "43a621684ffa47fc008be98b15ff7becaf3a72fa",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "5.10.253",
              "lessThan": "5.10.273",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "5.15.203",
              "lessThan": "5.15.224",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "6.1.167",
              "lessThan": "6.1.188",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "6.6.130",
              "lessThan": "6.6.157",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "6.12.78",
              "lessThan": "6.12.109",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "6.18.19",
              "lessThan": "6.18.50",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "6.19.9",
              "lessThan": "6.20",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/base/property.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "7.0",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "7.0",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.10.273",
              "lessThanOrEqual": "5.10.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.15.224",
              "lessThanOrEqual": "5.15.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.188",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.157",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.109",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.50",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.4",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 8.4,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 5.9
      }
    ]
  },
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/04004fa33730031392d987a9c1bbd8a0e1c4794b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1900692555826753adab8799a1a8d50bb1ee200c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/20ed517e416df89448029293304c9e180c26cd4b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/45a8fc4a12751833ed3868095d18200a85336760",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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    {
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    {
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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    {
      "url": "https://git.kernel.org/stable/c/ba69d892ff4e4a58cc12a2cae106b112db3306cc",
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    {
      "url": "https://git.kernel.org/stable/c/f4ae79b5f00130aacaddb1f3eb2e5ef711fbf9e0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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  ]
}