CVE-2026-68089 iio: core: fix uninitialized data in debugfs

Not scored Published 10 Aug 2026 Updated 17 Aug 2026

A local attacker with debugfs access can read uninitialized kernel memory due to missing input validation in the IIO core subsystem.

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-2026-68089?

CVE-2026-68089 is a vulnerability in Linux, published on 10 Aug 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: core: fix uninitialized data in debugfs

If *ppos is non-zero then simple_write_to_buffer() will not initialize the start of buf[]. Non zero values for *ppos aren't going to work anyway. Test for them at the start of the function and return -EINVAL.

Which versions are affected by CVE-2026-68089?

How do I fix CVE-2026-68089?

Apply the vendor's patch.

Is CVE-2026-68089 being exploited?

There is no known exploitation of CVE-2026-68089 in the wild and no public exploit code.

Sources

Also known as BELL-CVE-2026-68089, DEBIAN-CVE-2026-68089, GHSA-93xr-82qr-68rh, UBUNTU-CVE-2026-68089.