CVE-2026-53350ASoC: wm_adsp: Fix NULL dereference when removing firmware controls

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.

Affected packages & fixed versions

Affected products (as reported)

References

• https://git.kernel.org/stable/c/5ee9bbe2af2f373e08d3017f9aef2f2eaf29fbc3
• https://git.kernel.org/stable/c/10def23b67b42679d5b1a356e1a6f3498bd188c3
• https://git.kernel.org/stable/c/2f1be283aa777d655525d000d16474b7e7d015ea
• https://git.kernel.org/stable/c/12e579b889624ec54a201d98fdff975de556c731
• https://git.kernel.org/stable/c/6effd6f7b0ba1f5d1df702b2ef7460bcc215e9b7
• https://git.kernel.org/stable/c/7d3fb78b550301e43fdc60312aed733069694426
• https://cert-portal.siemens.com/productcert/html/ssa-784472.html