{"id":"CVE-2026-89938","title":"In the Linux kernel, the following vulnerability has been resolved:\n\niio: chemical: atlas-sensor: use iio_trigger_poll_nested() to fix remove UAF\n\nThe atlas driver requests its hardware data-ready IRQ with\ndevm_request_threaded_irq(); it…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\niio: chemical: atlas-sensor: use iio_trigger_poll_nested() to fix remove UAF\n\nThe atlas driver requests its hardware data-ready IRQ with\ndevm_request_threaded_irq(); it…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= 7103b99b031cb0ff6979331757bfc4893f37ae9e < f64b437641b5a70c18bb0fd38da2b69d8926c871","Linux >= 7103b99b031cb0ff6979331757bfc4893f37ae9e < 91e12b0fbd7047d02bf4ef4dbc491b9ef0159250","Linux >= 7103b99b031cb0ff6979331757bfc4893f37ae9e < 2071624c3d0f497ca91da78858e6f30d7112fea6","Linux >= 7103b99b031cb0ff6979331757bfc4893f37ae9e < 30b0d44c978bbc857bd68b71dab371805653de70","Linux >= 7103b99b031cb0ff6979331757bfc4893f37ae9e < be61c8c6252671ecf1fee0ad90f87669e0be1e20","Linux 4.8"],"published":"2026-09-16","updated":"2026-09-16","sourceUpdated":"2026-09-16T15:18:19.210","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89938","references":[{"url":"https://git.kernel.org/stable/c/2071624c3d0f497ca91da78858e6f30d7112fea6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/30b0d44c978bbc857bd68b71dab371805653de70","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/91e12b0fbd7047d02bf4ef4dbc491b9ef0159250","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/be61c8c6252671ecf1fee0ad90f87669e0be1e20","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f64b437641b5a70c18bb0fd38da2b69d8926c871","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-16T10:53:53.967Z","epss":0.00159,"epssPercentile":0.05446,"slug":"CVE-2026-89938","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\niio: chemical: atlas-sensor: use iio_trigger_poll_nested() to fix remove UAF\n\nThe atlas driver requests its hardware data-ready IRQ with\ndevm_request_threaded_irq(); its threaded handler queues an irq_work,\natlas_work_handler(), that calls iio_trigger_poll(data->trig).\n\nThe IRQ is devm-managed, so free_irq() runs from the devres unwind after\natlas_remove() returns without flushing that irq_work.  Once a buffer is\nenabled, conversion-complete IRQs keep firing and queueing it; a pending\nirq_work can therefore run after the unwind has freed atlas_data/indio_dev\nand the trigger, when atlas_work_handler() derives the atlas_data pointer\nvia container_of() and dereferences data->trig, a use-after-free.\n\nCall iio_trigger_poll_nested() directly from the threaded handler instead\nof bouncing through irq_work.  free_irq() then drains the threaded handler,\nclosing the window; other iio drivers with a threaded data-ready IRQ do the\nsame (e.g. bmi270).\n\nThis issue was found by an in-house static analysis tool.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":205103,"id":"CVE-2026-89938","ts":1789570705244,"field":"cvss","old":null,"new":"7.8"},{"seq":205102,"id":"CVE-2026-89938","ts":1789570705244,"field":"severity","old":"none","new":"high"}]}