CVE-2026-64492 iio: temperature: tmp006: use devm_iio_trigger_register
A use-after-free vulnerability in the Linux kernel tmp006 temperature sensor driver allows local attackers to cause a system crash or potentially execute code during module unload.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-64492?
CVE-2026-64492 is an use after free vulnerability in Linux, published on 25 Jul 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: temperature: tmp006: use devm_iio_trigger_register
tmp006_probe() allocates the DRDY trigger with devm_iio_trigger_alloc() but registers it with plain iio_trigger_register(). The driver has no .remove() callback, so on module unload the trigger stays in the global trigger list while its memory is freed by devm, leaving a dangling entry.
Switch to devm_iio_trigger_register() so the registration is undone in the same devm scope as the allocation.
Which versions are affected by CVE-2026-64492?
How do I fix CVE-2026-64492?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-64492 being exploited?
There is no known exploitation of CVE-2026-64492 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-64492, DEBIAN-CVE-2026-64492, GHSA-fg54-gxf9-gvmv, ROOT-OS-UBUNTU-2204-CVE-2026-64492, UBUNTU-CVE-2026-64492.