CVE-2026-90249 iio: light: gp2ap002: Fix unbalanced runtime PM on repeated event writes
Repeated writes to the gp2ap002 light sensor event attribute cause runtime PM reference leaks or underflows, preventing device suspension and triggering kernel warnings.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-90249?
CVE-2026-90249 is a denial of service vulnerability in Linux, published on 17 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-90249?
How do I fix CVE-2026-90249?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-90249 being exploited?
There is no known exploitation of CVE-2026-90249 in the wild and no public exploit code.
Sources
Also known as AZL-102702, BELL-CVE-2026-90249, DEBIAN-CVE-2026-90249, GHSA-cp7w-v98j-9px9, UBUNTU-CVE-2026-90249.