CVE-2026-89797

/// Technical description

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

power: supply: ab8500_fg: fix use-after-free on remove

ab8500_fg_remove() destroys the driver workqueue while the threaded

interrupt handlers are still armed; they are devm-managed and freed

only after ->remove() returns, so a handler that fires in that

window queues work on the freed workqueue.

Tear the workqueue down through devm instead, registering its cleanup

after the power supply and before the interrupt requests. devm then

frees the interrupts first, so the handlers can no longer queue work,

before disabling the delayed and plain work items and destroying the

workqueue. Disabling the items, rather than cancelling them, keeps

them disabled so no producer (including the power-supply

external_power_changed callback) can requeue them.

Found by an in-house static analysis tool.

/// 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