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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-89938
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-16 11:17:03 UTC
Updated2026-09-16 15:18:19 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 7103b99b031cb0ff6979331757bfc4893f37ae9e f64b437641b5a70c18bb0fd38da2b69d8926c871 git Not specified
CNA Linux Linux affected 7103b99b031cb0ff6979331757bfc4893f37ae9e 91e12b0fbd7047d02bf4ef4dbc491b9ef0159250 git Not specified
CNA Linux Linux affected 7103b99b031cb0ff6979331757bfc4893f37ae9e 2071624c3d0f497ca91da78858e6f30d7112fea6 git Not specified
CNA Linux Linux affected 7103b99b031cb0ff6979331757bfc4893f37ae9e 30b0d44c978bbc857bd68b71dab371805653de70 git Not specified
CNA Linux Linux affected 7103b99b031cb0ff6979331757bfc4893f37ae9e be61c8c6252671ecf1fee0ad90f87669e0be1e20 git Not specified
CNA Linux Linux affected 4.8 Not specified
CNA Linux Linux unaffected 4.8 semver Not specified
CNA Linux Linux unaffected 6.6.157 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.110 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.51 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.5 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/be61c8c6252671ecf1fee0ad90f87669e0be1e20 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/91e12b0fbd7047d02bf4ef4dbc491b9ef0159250 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/30b0d44c978bbc857bd68b71dab371805653de70 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f64b437641b5a70c18bb0fd38da2b69d8926c871 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2071624c3d0f497ca91da78858e6f30d7112fea6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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