CVE-2026-89934 iio: light: ltrf216a: fix runtime PM reference leak in error path
A reference leak in the ltrf216a light sensor driver prevents device autosuspend, causing potential 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-2026-89934?
CVE-2026-89934 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: light: ltrf216a: fix runtime PM reference leak in error path
ltrf216a_get_lux() acquires a runtime PM reference by calling ltrf216a_set_power_state(data, true). However, if ltrf216a_read_data() fails, the function returns immediately without dropping the reference.
This leaves the runtime PM usage count unbalanced, preventing the device from autosuspending after a failed read.
Fix this by releasing the runtime PM reference before returning from the error path.
Which versions are affected by CVE-2026-89934?
How do I fix CVE-2026-89934?
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-2026-89934 being exploited?
There is no known exploitation of CVE-2026-89934 in the wild and no public exploit code.
Sources
Also known as AZL-101658, BELL-CVE-2026-89934, DEBIAN-CVE-2026-89934, GHSA-jq92-qr7r-j3m3, UBUNTU-CVE-2026-89934.