ASoC: wm_adsp: Fix NULL dereference when removing firmware controls

Summary

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.

Timeline

1. Jul 1, 2026, 1:32 PM UTCCVE published
2. Oct 15, 2026, 1:23 AM UTCRecord last updated

Affected versions

• Linux Linux

  From 0700bc2fb94c28459f57a10d2ee2c7ef4cb70862 · fixed in 5ee9bbe2af2f373e08d3017f9aef2f2eaf29fbc3; From 0700bc2fb94c28459f57a10d2ee2c7ef4cb70862 · fixed in 10def23b67b42679d5b1a356e1a6f3498bd188c3; From 0700bc2fb94c28459f57a10d2ee2c7ef4cb70862 · fixed in 2f1be283aa777d655525d000d16474b7e7d015ea; From 0700bc2fb94c28459f57a10d2ee2c7ef4cb70862 · fixed in 12e579b889624ec54a201d98fdff975de556c731; From 0700bc2fb94c28459f57a10d2ee2c7ef4cb70862 · fixed in 6effd6f7b0ba1f5d1df702b2ef7460bcc215e9b7; From 0700bc2fb94c28459f57a10d2ee2c7ef4cb70862 · fixed in 7d3fb78b550301e43fdc60312aed733069694426

• Linux Linux

  5.16

• KernelLinux

  From 5.16.0 · fixed in 6.1.176; From 6.2.0 · fixed in 6.6.143; From 6.7.0 · fixed in 6.12.94; From 6.13.0 · fixed in 6.18.36; From 6.19.0 · fixed in 7.0.13

References 6