{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "df6d7277e5525d6cce63127dd93ebec4c6354fa0"
            },
            {
              "fixed": "ffe02f7c4e36090154646612e67d331832f92037"
            },
            {
              "fixed": "1c24e5fc0c7096e00c202a6a3e0c342c1afb47c2"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38682.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: core: Fix double-free of fwnode in i2c_unregister_device()\n\nBefore commit df6d7277e552 (\"i2c: core: Do not dereference fwnode in struct\ndevice\"), i2c_unregister_device() only called fwnode_handle_put() on\nof_node-s in the form of calling of_node_put(client-\u003edev.of_node).\n\nBut after this commit the i2c_client's fwnode now unconditionally gets\nfwnode_handle_put() on it.\n\nWhen the i2c_client has no primary (ACPI / OF) fwnode but it does have\na software fwnode, the software-node will be the primary node and\nfwnode_handle_put() will put() it.\n\nBut for the software fwnode device_remove_software_node() will also put()\nit leading to a double free:\n\n[   82.665598] ------------[ cut here ]------------\n[   82.665609] refcount_t: underflow; use-after-free.\n[   82.665808] WARNING: CPU: 3 PID: 1502 at lib/refcount.c:28 refcount_warn_saturate+0xba/0x11\n...\n[   82.666830] RIP: 0010:refcount_warn_saturate+0xba/0x110\n...\n[   82.666962]  \u003cTASK\u003e\n[   82.666971]  i2c_unregister_device+0x60/0x90\n\nFix this by not calling fwnode_handle_put() when the primary fwnode is\na software-node.",
  "id": "CVE-2025-38682",
  "modified": "2026-04-01T23:09:48.021834343Z",
  "published": "2025-09-04T15:32:37.403Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1c24e5fc0c7096e00c202a6a3e0c342c1afb47c2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ffe02f7c4e36090154646612e67d331832f92037"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38682.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38682"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.3",
  "summary": "i2c: core: Fix double-free of fwnode in i2c_unregister_device()"
}