CVE-2026-45885

/// Technical description

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

power: supply: cpcap-battery: Fix use-after-free in power_supply_changed()

Using the `devm_` variant for requesting IRQ _before_ the `devm_`

variant for allocating/registering the `power_supply` handle, means that

the `power_supply` 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 `power_supply`

handle has been freed, *but* just _before_ the corresponding

unregistration of the IRQ handler has run.

This will lead to the IRQ handler calling `power_supply_changed()` with

a freed `power_supply` handle. Which usually crashes the system or

otherwise silently corrupts the memory...

Note that there is a similar situation which can also happen during

`probe()`; the possibility of an interrupt firing _before_ registering

the `power_supp

/// 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