---
title: "CVE-2026-89938: Linux Kernel iio Chemical Atlas-sensor - Use After Free"
description: "Linux kernel iio chemical atlas-sensor contains a use-after-free caused by improper irq_work handling in the threaded IRQ handler, letting attackers cause memory corruption, exploit requires hardware IRQ triggering."
url: https://panop.io/threat-heartbeat/CVE-2026-89938/
---

# CVE-2026-89938 Linux Kernel iio Chemical Atlas-sensor - Use After Free

Linux kernel iio chemical atlas-sensor contains a use-after-free caused by improper irq\_work handling in the threaded IRQ handler, letting attackers cause memory corruption, exploit requires hardware IRQ triggering.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.17% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89938)

## Details

Type

Use After Free

Impact

Denial Of Service

CVSS vector

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

Published

16 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix using iio\_trigger\_poll\_nested() in the threaded handler.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-89938](https://nvd.nist.gov/vuln/detail/CVE-2026-89938)
- [https://git.kernel.org/stable/c/91e12b0fbd7047d02bf4ef4dbc491b9ef0159250](https://git.kernel.org/stable/c/91e12b0fbd7047d02bf4ef4dbc491b9ef0159250)
- [https://git.kernel.org/stable/c/be61c8c6252671ecf1fee0ad90f87669e0be1e20](https://git.kernel.org/stable/c/be61c8c6252671ecf1fee0ad90f87669e0be1e20)
- [https://git.kernel.org/stable/c/f64b437641b5a70c18bb0fd38da2b69d8926c871](https://git.kernel.org/stable/c/f64b437641b5a70c18bb0fd38da2b69d8926c871)
- [https://git.kernel.org/stable/c/2071624c3d0f497ca91da78858e6f30d7112fea6](https://git.kernel.org/stable/c/2071624c3d0f497ca91da78858e6f30d7112fea6)
- [https://git.kernel.org/stable/c/30b0d44c978bbc857bd68b71dab371805653de70](https://git.kernel.org/stable/c/30b0d44c978bbc857bd68b71dab371805653de70)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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