CVE-2026-46246 — power: supply: pm8916_lbc: Fix use-after-free for extcon in IRQ handler

Affected: Linux

In the Linux kernel, the following vulnerability has been resolved:

power: supply: pm8916_lbc: Fix use-after-free for extcon in IRQ handler

Using the `devm_` variant for requesting IRQ _before_ the `devm_` variant for allocating/registering the `extcon` handle, means that the `extcon` handle will be deallocated/unregistered _before_ the interrupt handler (since `devm_` naturally deallocates in reverse allocation order). This means that during removal, there is a race condition where an interrupt can fire just _after_ the `extcon` handle has been freed, *but* just _before_ the corresponding unregistration of the IRQ handler has run.

This will lead to the IRQ handler calling `extcon_set_state_sync()` with a freed `extcon` handle. Which usually crashes the system or otherwise silently corrupts the memory...

Fix this racy use-after-free by making sure the IRQ is requested _after_ the registration of the `extcon` handle.

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CVE-2026-46246 — power: supply: pm8916_lbc: Fix use-after-free for extcon in IRQ handler