CVEvulnerability
CVE-2026-89474
- Status
- Received
- Published
- 2026-09-11
- Last modified
- 2026-10-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Description
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.
References
- https://git.kernel.org/stable/c/2cfb59dc9df8b5ebdd95e3d874a7f4690cee2bc8 git.kernel.org
- https://git.kernel.org/stable/c/2dd6cd823777bea6d9a880a12a92a73ec76aee0b git.kernel.org
- https://git.kernel.org/stable/c/9a467bd1e6811011026ad4c8de701b940d88a00c git.kernel.org
- https://git.kernel.org/stable/c/9dcfdf6c598301b278f0b3490eb2bf4f600524e2 git.kernel.org
- https://git.kernel.org/stable/c/9e1aba34df9a87d53460888e05718717c0f69343 git.kernel.org
- https://git.kernel.org/stable/c/c8addb842ae8dcf69c15fc976e33e3bd538a41d7 git.kernel.org
- https://git.kernel.org/stable/c/fd08d4dbbec07a44f01b0ddb041912be0dc88f8c git.kernel.org