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

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-10-19

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.

Affected products

• Linux kernel: 5.7 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

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
• https://git.kernel.org/stable/c/70b9482926ca92862460e659f5e5fde99ae0b4fa
• https://git.kernel.org/stable/c/8e76ab81319858736ccf23141e9415f9a1869337
• https://git.kernel.org/stable/c/b2d7a97d75b648a643f60d77f4d6d70161268855

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