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

Summary

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.

Timeline

1. Sep 16, 2026, 10:32 AM UTCCVE published
2. Oct 19, 2026, 8:55 AM UTCRecord last updated

Affected versions

• Linux Linux

  From 7103b99b031cb0ff6979331757bfc4893f37ae9e · fixed in f64b437641b5a70c18bb0fd38da2b69d8926c871; From 7103b99b031cb0ff6979331757bfc4893f37ae9e · fixed in 91e12b0fbd7047d02bf4ef4dbc491b9ef0159250; From 7103b99b031cb0ff6979331757bfc4893f37ae9e · fixed in 2071624c3d0f497ca91da78858e6f30d7112fea6; From 7103b99b031cb0ff6979331757bfc4893f37ae9e · fixed in 30b0d44c978bbc857bd68b71dab371805653de70; From 7103b99b031cb0ff6979331757bfc4893f37ae9e · fixed in be61c8c6252671ecf1fee0ad90f87669e0be1e20

• Linux Linux

  4.8

• KernelLinux

  From 4.8.0 · fixed in 6.6.157; From 6.7.0 · fixed in 6.12.110; From 6.13.0 · fixed in 6.18.51; From 6.19.0 · fixed in 7.2.5

References 5