CVE-2026-53350

In the Linux kernel, the following vulnerability has been resolved:

ASoC: wm_adsp: Fix NULL dereference when removing firmware controls

In wmadspcontrol_remove() check that the priv pointer is not NULL before attempting to cleanup what it points to.

When csdsp creates a control it calls wmadspcontroladdcb() so that wmadsp 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 controladd() callback that hides the control, so wmadspcontroladd() is not called.

When csdspremove destroys its control list it calls wmadspcontrolremove() for each control. But wmadspcontrolremove() was attempting to cleanup the private data pointed to by cs_ctl->priv without checking the pointer for NULL.