GHSA-542V-8XR4-X59M
Vulnerability from github – Published: 2026-09-11 21:31 – Updated: 2026-09-14 15:32In 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.
{
"affected": [],
"aliases": [
"CVE-2026-89474"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-11T20:19:28Z",
"severity": null
},
"details": "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.",
"id": "GHSA-542v-8xr4-x59m",
"modified": "2026-09-14T15:32:25Z",
"published": "2026-09-11T21:31:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89474"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2cfb59dc9df8b5ebdd95e3d874a7f4690cee2bc8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2dd6cd823777bea6d9a880a12a92a73ec76aee0b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9a467bd1e6811011026ad4c8de701b940d88a00c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9dcfdf6c598301b278f0b3490eb2bf4f600524e2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9e1aba34df9a87d53460888e05718717c0f69343"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c8addb842ae8dcf69c15fc976e33e3bd538a41d7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fd08d4dbbec07a44f01b0ddb041912be0dc88f8c"
}
],
"schema_version": "1.4.0",
"severity": []
}
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