Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 32e4978bb920d047fe5de3ea42d176f267c01f63 before 9dcfdf6c598301b278f0b3490eb2bf4f600524e2; affected 32e4978bb920d047fe5de3ea42d176f267c01f63 before fd08d4dbbec07a44f01b0ddb041912be0dc88f8c; affected 32e4978bb920d047fe5de3ea42d176f267c01f63 before 2cfb59dc9df8b5ebdd95e3d874a7f4690cee2bc8; affected 32e4978bb920d047fe5de3ea42d176f267c01f63 before 9a467bd1e6811011026ad4c8de701b940d88a00c; affected 32e4978bb920d047fe5de3ea42d176f267c01f63 before 9e1aba34df9a87d53460888e05718717c0f69343; affected 32e4978bb920d047fe5de3ea42d176f267c01f63 before c8addb842ae8dcf69c15fc976e33e3bd538a41d7; affected 32e4978bb920d047fe5de3ea42d176f267c01f63 before 2dd6cd823777bea6d9a880a12a92a73ec76aee0b |
| Linux / Linux | affected 5.12; unaffected 0 before 5.12; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.109 through 6.12.*; unaffected 6.18.50 through 6.18.*; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/9dcfdf6c598301b278f0b3490eb2bf4f600524e2
- https://git.kernel.org/stable/c/fd08d4dbbec07a44f01b0ddb041912be0dc88f8c
- https://git.kernel.org/stable/c/2cfb59dc9df8b5ebdd95e3d874a7f4690cee2bc8
- https://git.kernel.org/stable/c/9a467bd1e6811011026ad4c8de701b940d88a00c
- https://git.kernel.org/stable/c/9e1aba34df9a87d53460888e05718717c0f69343
- https://git.kernel.org/stable/c/c8addb842ae8dcf69c15fc976e33e3bd538a41d7
- https://git.kernel.org/stable/c/2dd6cd823777bea6d9a880a12a92a73ec76aee0b