CVE-2026-53350
UnknownSummary
In the Linux kernel, a vulnerability was found in the wm_adsp driver where a NULL pointer dereference can occur when removing firmware controls. The issue happens when private control data was not created (e.g., for SYSTEM controls or when a codec driver's callback hides the control), and wm_adsp_control_remove() attempts to clean it up without checking the pointer.
Risk Assessment
A NULL pointer dereference can cause a kernel panic during audio driver removal or disconnection, leading to service disruption and potential data loss.
Recommendation
Immediately update the Linux kernel to a version containing the fix (commit adding NULL pointer check in wm_adsp_control_remove()). Monitor official security advisories from your distribution.
Original NVD description (English source)
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.