CVE-2026-89938

Status: UPDATED  |  Advisory ID: CVE-2026-89938

Key Details

Affected Products, Subsystems & Sectors

What to Know

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

iio: chemical: atlas-sensor: use iio_trigger_poll_nested() to fix remove UAF

The atlas driver requests its hardware data-ready IRQ with

devm_request_threaded_irq(); its threaded handler queues an irq_work,

atlas_work_handler(), that calls iio_trigger_poll(data->trig).

The IRQ is devm-managed, so free_irq() runs from the devres unwind after

atlas_remove() returns without flushing that irq_work. Once a buffer is

enabled, conversion-complete IRQs keep firing and queueing it; a pending

irq_work can therefore run after the unwind has freed atlas_data/indio_dev

and the trigger, when atlas_work_handler() derives the atlas_data pointer

via container_of() and dereferences data->trig, a use-after-free.

Call iio_trigger_poll_nested() directly from the threaded handler instead

of bouncing through irq_work. free_irq() then drains the threaded handler,

closing the window; other iio drivers with a threaded data-ready IRQ do the

same (e.g. bmi270).

This issue was found by an in-house static analysis tool. (NVD)

What to Do

Monitor Linux's web page for any future patch releases.

References