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CVE-2026-89474 (GCVE-0-2026-89474)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:43 – Updated: 2026-09-14 12:00
VLAI
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 32e4978bb920d047fe5de3ea42d176f267c01f63 , < 9dcfdf6c598301b278f0b3490eb2bf4f600524e2 (git)
Affected: 32e4978bb920d047fe5de3ea42d176f267c01f63 , < fd08d4dbbec07a44f01b0ddb041912be0dc88f8c (git)
Affected: 32e4978bb920d047fe5de3ea42d176f267c01f63 , < 2cfb59dc9df8b5ebdd95e3d874a7f4690cee2bc8 (git)
Affected: 32e4978bb920d047fe5de3ea42d176f267c01f63 , < 9a467bd1e6811011026ad4c8de701b940d88a00c (git)
Affected: 32e4978bb920d047fe5de3ea42d176f267c01f63 , < 9e1aba34df9a87d53460888e05718717c0f69343 (git)
Affected: 32e4978bb920d047fe5de3ea42d176f267c01f63 , < c8addb842ae8dcf69c15fc976e33e3bd538a41d7 (git)
Affected: 32e4978bb920d047fe5de3ea42d176f267c01f63 , < 2dd6cd823777bea6d9a880a12a92a73ec76aee0b (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.12
Unaffected: 0 , < 5.12 (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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{
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          "programFiles": [
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              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
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      ],
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          "nodes": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: bq256xx: drain usb_work before freeing the charger\n\nThe USB-PHY notifier queues usb_work, whose handler calls\npower_supply_changed(bq-\u003echarger). The reset devm action only unregisters\nthe notifier and was registered before the power supplies, so devm frees\nbq-\u003echarger on unwind before the action runs; a usb_work still queued can\nthen dereference it.\n\nRegister the reset action after the power supplies, so it unregisters\nthe notifiers and drains usb_work before the supplies are released.\nInitialize usb_work and obtain the PHY references before registering\nthe notifiers, so the worker cannot run before the supplies exist.\n\nFound by static analysis."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-14T12:00:10.678Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/9dcfdf6c598301b278f0b3490eb2bf4f600524e2"
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          "url": "https://git.kernel.org/stable/c/2dd6cd823777bea6d9a880a12a92a73ec76aee0b"
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      ],
      "title": "power: supply: bq256xx: drain usb_work before freeing the charger",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89474",
    "datePublished": "2026-09-11T19:43:31.882Z",
    "dateReserved": "2026-09-11T19:38:34.710Z",
    "dateUpdated": "2026-09-14T12:00:10.678Z",
    "state": "PUBLISHED"
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-09-15",
      "epss": "0.00172",
      "percentile": "0.06888"
    },
    "microsoft_vex": {
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      "cve": "CVE-2026-89474",
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      "initial_release_date": "2026-09-13T01:03:19.000Z",
      "product_status:known_not_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "power: supply: bq256xx: drain usb_work before freeing the charger",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-89474.json",
      "version": "3"
    },
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-15T05:36:26+00:00",
      "cve": "CVE-2026-89474",
      "id": "CVE-2026-89474",
      "initial_release_date": "2026-09-11T19:43:31.882000+00:00",
      "product_status:known_affected": "2",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Use-after-free in bq256xx power supply driver",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89474.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-16T00:03:13Z",
      "cve": "CVE-2026-89474",
      "id": "CVE-2026-89474",
      "initial_release_date": "2026-09-12T16:27:50Z",
      "product_status:known_affected": "126",
      "product_status:known_not_affected": "221",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-89474",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-89474.json",
      "version": "4"
    }
  }
}



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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.

Sightings

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Nomenclature

  • 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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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.