UnratedFix available

power: supply: bq256xx: drain usb_work before freeing the charger

Type: advisorySources: OSV

In the Linux kernel, the following vulnerability has been resolved: power: supply: bq256xx: drain usb_work before freeing the charger The USB-PHY notifier queues usb_work, whose handler calls power_supply_changed(bq->charger). The reset devm action only unregisters the notifier and was registered before the power supplies, so devm frees bq->charger on unwind before the action runs; a usb_work still queued can then dereference it. Register the reset action after the power supplies, so it unregisters the notifiers and drains usb_work before the supplies are released. Initialize usb_work and obtain the PHY references before registering the notifiers, so the worker cannot run before the supplies exist. Found by static analysis.

Products: Kernel
Affected versions: Not specified
Fixed versions: 5.15.221, 6.1.188, 6.12.109, 6.18.50, 6.6.157, 7.2.4
CVEs: CVE-2026-89474
Confirmed fixed CVEs: Not specified
Updated in this feed: 8 Nov 2026, 02:46 UTC · Revision 1

Source evidence

power: supply: bq256xx: drain usb_work before freeing the charger

core-osv · Original source

Published 11 Sept 2026, 19:43 UTC

osv:CVE-2026-89474

Kernel

Fixed versions: 5.15.221, 6.1.188, 6.6.157, 6.12.109, 6.18.50, 7.2.4

Complete source record

{
  "id": "d85f46649aef80909992812b51ca243a73b807f06ea9d2137fdf0bb30d481cd8",
  "url": "https://osv.dev/vulnerability/CVE-2026-89474",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "power: supply: bq256xx: drain usb_work before freeing the charger",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: power: supply: bq256xx: drain usb_work before freeing the charger The USB-PHY notifier queues usb_work, whose handler calls power_supply_changed(bq->charger). The reset devm action only unregisters the notifier and was registered before the power supplies, so devm frees bq->charger on unwind before the action runs; a usb_work still queued can then dereference it. Register the reset action after the power supplies, so it unregisters the notifiers and drains usb_work before the supplies are released. Initialize usb_work and obtain the PHY references before registering the notifiers, so the worker cannot run before the supplies exist. Found by static analysis.",
    "evidence": "osv:CVE-2026-89474",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.221",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.188",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.157",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.109",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.50",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-89474",
      "aliases": [
        "CVE-2026-89474"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                {
                  "fixed": "9dcfdf6c598301b278f0b3490eb2bf4f600524e2"
                },
                {
                  "fixed": "fd08d4dbbec07a44f01b0ddb041912be0dc88f8c"
                },
                {
                  "fixed": "2cfb59dc9df8b5ebdd95e3d874a7f4690cee2bc8"
                },
                {
                  "fixed": "9a467bd1e6811011026ad4c8de701b940d88a00c"
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                {
                  "fixed": "9e1aba34df9a87d53460888e05718717c0f69343"
                },
                {
                  "fixed": "c8addb842ae8dcf69c15fc976e33e3bd538a41d7"
                },
                {
                  "fixed": "2dd6cd823777bea6d9a880a12a92a73ec76aee0b"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89474.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.12.0"
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                  "fixed": "5.15.221"
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                {
                  "introduced": "5.16.0"
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                  "fixed": "6.1.188"
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            {
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                {
                  "introduced": "6.2.0"
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            {
              "type": "ECOSYSTEM",
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                  "introduced": "6.7.0"
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                {
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            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.50"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.2.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89474.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:53.025431362Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/2cfb59dc9df8b5ebdd95e3d874a7f4690cee2bc8",
        "https://git.kernel.org/stable/c/2dd6cd823777bea6d9a880a12a92a73ec76aee0b",
        "https://git.kernel.org/stable/c/9a467bd1e6811011026ad4c8de701b940d88a00c",
        "https://git.kernel.org/stable/c/9dcfdf6c598301b278f0b3490eb2bf4f600524e2",
        "https://git.kernel.org/stable/c/9e1aba34df9a87d53460888e05718717c0f69343",
        "https://git.kernel.org/stable/c/c8addb842ae8dcf69c15fc976e33e3bd538a41d7",
        "https://git.kernel.org/stable/c/fd08d4dbbec07a44f01b0ddb041912be0dc88f8c",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89474.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-89474",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89474.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-89474",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 521919,
  "published_at": "2026-09-11T19:43:31.882+00:00"
}