CVE-2026-90060 ALSA: control: Don't add invalid kcontrols to LED layer
A local attacker can trigger a kernel crash by creating a write-only ALSA control element, causing a NULL pointer dereference in the LED layer.
- 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-2026-90060?
CVE-2026-90060 is a 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:
ALSA: control: Don't add invalid kcontrols to LED layer
The kcontrol LED state layer tries to track the all associated kcontrol elements with naive assumptions that they are readable. But one can create a write-only element that has no get callback (even a user element can do it), and this may lead to a NULL dereference at the call chain of snd_ctl_led_notify(), as found by syzkaller.
For avoiding the Oops, add a sanity check of the kcontrol's info and get callbacks, and just skip the invalid kcontrols before assigning the kctl to the LED layer.
Which versions are affected by CVE-2026-90060?
How do I fix CVE-2026-90060?
Apply the vendor's patch.
Is CVE-2026-90060 being exploited?
There is no known exploitation of CVE-2026-90060 in the wild and no public exploit code.
Sources
Also known as AZL-102021, BELL-CVE-2026-90060, DEBIAN-CVE-2026-90060, GHSA-pxhq-v7w3-j8wf, UBUNTU-CVE-2026-90060.