CVE-2026-46246

/// Technical description

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.

/// 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