CVE-2026-89464 in Linux
Resumen
por MITRE • 2026-09-12
In the Linux kernel, the following vulnerability has been resolved:
power: supply: twl4030_charger: cancel workers via devm
bci is devm-allocated. Two workers (bci->work and bci->current_worker) dereference it. twl4030_bci_remove() disables charging and masks interrupts. It cancels neither worker. A worker pending at remove() can run after devm frees bci.
The USB transceiver comes from devm_usb_get_phy_by_node(). devm unregisters its notifier only after remove() returns. A cancel_work_sync() in remove() can then race a notifier reschedule. devm_work_autocancel() and devm_delayed_work_autocancel() avoid that. They cancel the workers during devm release, before bci is freed.
The current_worker is registered first, since devm will cancel in reverse order and bci->work can reschedule current_worker.
[Move comment about order into the commit message]
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