CVE-2026-53350 ASoC: wm_adsp: Fix NULL dereference when removing firmware controls
A NULL pointer dereference in the Linux kernel's wm_adsp driver can cause a system crash when removing firmware controls.
- 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-2026-53350?
CVE-2026-53350 is a medium-severity vulnerability in Linux kernel, published on 1 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:
ASoC: wm_adsp: Fix NULL dereference when removing firmware controls
In wm_adsp_control_remove() check that the priv pointer is not NULL before attempting to cleanup what it points to.
When cs_dsp creates a control it calls wm_adsp_control_add_cb() so that wm_adsp can create its own private control data. There are two cases where private data is not created:
1. The control is a SYSTEM control, so an ALSA control is not created.
2. The codec driver has registered a control_add() callback that hides the control, so wm_adsp_control_add() is not called.
When cs_dsp_remove destroys its control list it calls wm_adsp_control_remove() for each control. But wm_adsp_control_remove() was attempting to cleanup the private data pointed to by cs_ctl->priv without checking the pointer for NULL.
Weakness: CWE-476
Which versions are affected by CVE-2026-53350?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-53350?
Apply the vendor's patch.
Is CVE-2026-53350 being exploited?
There is no known exploitation of CVE-2026-53350 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-53350, DEBIAN-CVE-2026-53350, GHSA-q7rw-6rp9-vhj5, ROOT-OS-UBUNTU-2404-CVE-2026-53350, UBUNTU-CVE-2026-53350.