CVE-2026-89939 iio: chemical: atlas-sensor: fix PM reference leak in buffer postenable
A reference leak in the Atlas sensor driver prevents device autosuspend, potentially causing resource exhaustion and denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-89939?
CVE-2026-89939 is a denial of service vulnerability in Linux, published on 16 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: chemical: atlas-sensor: fix PM reference leak in buffer postenable
atlas_buffer_postenable() acquires a runtime PM reference with pm_runtime_resume_and_get() but returns the result of atlas_set_interrupt() directly. If atlas_set_interrupt() fails, the runtime PM reference is leaked and the device can never autosuspend.
Add pm_runtime_put_autosuspend() on the error path to balance the reference.
Which versions are affected by CVE-2026-89939?
How do I fix CVE-2026-89939?
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-2026-89939 being exploited?
There is no known exploitation of CVE-2026-89939 in the wild and no public exploit code.
Sources
Also known as AZL-101495, BELL-CVE-2026-89939, DEBIAN-CVE-2026-89939, GHSA-w73m-f97h-p6pv, UBUNTU-CVE-2026-89939.