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

Vulnerability from cvelistv5 – Published: 2026-09-11 19:43 – Updated: 2026-09-14 12:00
VLAI
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
References
Impacted products
Vendor Product Version CPE status
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)
guessed Create a notification for this product.
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)
guessed Create a notification for this product.
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          "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."
        }
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            "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."
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    "dateReserved": "2026-09-11T19:38:34.715Z",
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    "state": "PUBLISHED"
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      "date": "2026-09-15",
      "epss": "0.00144",
      "percentile": "0.03998"
    },
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      "cve": "CVE-2026-89504",
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      "product_status:known_not_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "regulator: as3722_get_regulator_dt_data: fix premature of_node_put leaving dangling of_node pointer",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-89504.json",
      "version": "3"
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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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/regulator/as3722-regulator.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"bc407334e9a6a745de5360395282beb2690adf48\",\"lessThan\":\"d9b1407477fb736978b04108073180ca84958936\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bc407334e9a6a745de5360395282beb2690adf48\",\"lessThan\":\"bd5606e9da1a01a61c7d2f5df36243414a0142be\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bc407334e9a6a745de5360395282beb2690adf48\",\"lessThan\":\"0bde4f140e90f87ebd49cd9c884c4bb3f19fe931\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bc407334e9a6a745de5360395282beb2690adf48\",\"lessThan\":\"eda08b6bd64f01ca9defbfcc9e0c3e30f46cfc02\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bc407334e9a6a745de5360395282beb2690adf48\",\"lessThan\":\"d3c1316d84e0a036890b00ae6e4c0b0b80f70c25\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bc407334e9a6a745de5360395282beb2690adf48\",\"lessThan\":\"95342d26f9c6b68a46ab57fa48428a3c4a423dd7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bc407334e9a6a745de5360395282beb2690adf48\",\"lessThan\":\"8648e29e5c01b6b677c704049189287e27255ccb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bc407334e9a6a745de5360395282beb2690adf48\",\"lessThan\":\"f9324d670ae0b88cbfb0aa48fcaefa5baeb8da4c\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/regulator/as3722-regulator.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.13\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.13\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.270\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.221\",\"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-rc1\",\"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/0bde4f140e90f87ebd49cd9c884c4bb3f19fe931\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8648e29e5c01b6b677c704049189287e27255ccb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/95342d26f9c6b68a46ab57fa48428a3c4a423dd7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bd5606e9da1a01a61c7d2f5df36243414a0142be\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d3c1316d84e0a036890b00ae6e4c0b0b80f70c25\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d9b1407477fb736978b04108073180ca84958936\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/eda08b6bd64f01ca9defbfcc9e0c3e30f46cfc02\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f9324d670ae0b88cbfb0aa48fcaefa5baeb8da4c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-13T06:56:47+00:00",
      "cve": "CVE-2026-89504",
      "id": "CVE-2026-89504",
      "initial_release_date": "2026-09-11T19:43:52.024000+00:00",
      "product_status:known_affected": "2",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Dangling pointer in regulator subsystem can lead to denial of service.",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89504.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-16T00:02:44Z",
      "cve": "CVE-2026-89504",
      "id": "CVE-2026-89504",
      "initial_release_date": "2026-09-16T00:02:44Z",
      "product_status:known_affected": "265",
      "product_status:known_not_affected": "88",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-89504",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-89504.json",
      "version": "2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.