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.

Timeline

1. Sep 11, 2026, 7:43 PM UTCCVE published
2. Oct 19, 2026, 8:47 AM UTCRecord last updated

Affected versions

• Linux Linux

  From 32e4978bb920d047fe5de3ea42d176f267c01f63 · fixed in 9dcfdf6c598301b278f0b3490eb2bf4f600524e2; From 32e4978bb920d047fe5de3ea42d176f267c01f63 · fixed in fd08d4dbbec07a44f01b0ddb041912be0dc88f8c; From 32e4978bb920d047fe5de3ea42d176f267c01f63 · fixed in 2cfb59dc9df8b5ebdd95e3d874a7f4690cee2bc8; From 32e4978bb920d047fe5de3ea42d176f267c01f63 · fixed in 9a467bd1e6811011026ad4c8de701b940d88a00c; From 32e4978bb920d047fe5de3ea42d176f267c01f63 · fixed in 9e1aba34df9a87d53460888e05718717c0f69343; From 32e4978bb920d047fe5de3ea42d176f267c01f63 · fixed in c8addb842ae8dcf69c15fc976e33e3bd538a41d7; From 32e4978bb920d047fe5de3ea42d176f267c01f63 · fixed in 2dd6cd823777bea6d9a880a12a92a73ec76aee0b

• Linux Linux

  5.12

• KernelLinux

  From 5.12.0 · fixed in 5.15.221; From 5.16.0 · fixed in 6.1.188; From 6.2.0 · fixed in 6.6.157; From 6.7.0 · fixed in 6.12.109; From 6.13.0 · fixed in 6.18.50; From 6.19.0 · fixed in 7.2.4

References 7