{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-89504",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-89504"
  ],
  "published": "2026-09-11T19:47:07Z",
  "summary": "regulator: as3722_get_regulator_dt_data: fix premature of_node_put leaving dangling of_node pointer",
  "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->dev.of_node. The\nfunction immediately calls of_node_put(np), releasing the reference and\nleaving pdev->dev.of_node as a dangling pointer.\n\nRemove the of_node_put(np) call to let the device hold the reference.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.188",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-89504"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d9b1407477fb736978b04108073180ca84958936"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/bd5606e9da1a01a61c7d2f5df36243414a0142be"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0bde4f140e90f87ebd49cd9c884c4bb3f19fe931"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/eda08b6bd64f01ca9defbfcc9e0c3e30f46cfc02"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d3c1316d84e0a036890b00ae6e4c0b0b80f70c25"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/95342d26f9c6b68a46ab57fa48428a3c4a423dd7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8648e29e5c01b6b677c704049189287e27255ccb"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f9324d670ae0b88cbfb0aa48fcaefa5baeb8da4c"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-14T12:06:03Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 8.4,
      "cvss_v3_severity": "High",
      "scenario": "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->dev.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."
    }
  }
}