PT-2026-46009 · Linux · Linux

Published 2026-06-03 · Updated 2026-06-03 · CVE-2026-46246

NVD

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.

Related Identifiers

CVE-2026-46246

Affected Products

Linux

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-46246 · Security Note
• https://git.kernel.org/stable/c/48e0f68b50c344bb2d78d65dd98f93e41276ee00 · Note
• https://git.kernel.org/stable/c/47abfc207ab02cf1297257e282e8048da63f0d08 · Note
• https://git.kernel.org/stable/c/9fab0120907e6965168e55b1e17cb9dfaf262b86 · Note
• https://git.kernel.org/stable/c/23067259919663580c6f81801847cfc7bd54fd1f · Note