CVE-2026-90249

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.

References

• https://git.kernel.org/stable/c/0fc740c25c9abb25113398ebb58e2f2ce57741a7
• https://git.kernel.org/stable/c/470edb012b1d9a4fba1cd59e329e60f0798c791a
• https://git.kernel.org/stable/c/56fe8e5f313a64e458bb6f8b982de925345e21a7
• https://git.kernel.org/stable/c/579c049b4cb6fc72ce2c505fc5334540be0efcd3
• https://git.kernel.org/stable/c/685d9d1e5c47e024413981fb7eddab86132b04a1