CVE-2026-89474

/// Technical 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.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References