Copyright © 2012 Red Hat, Inc. All rights reserved. Low 2026-07-01T00:00:00 kernel: ASoC: wm_adsp: Fix NULL dereference when removing firmware controls 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CWE-476

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.

A flaw was found in the Linux kernel's Advanced Linux Sound Architecture (ASoC) Wolfson Microelectronics Audio Digital Signal Processor (wm_adsp) driver. The `wm_adsp_control_remove()` function attempts to clean up private control data without verifying if the pointer to this data is null. This can occur when certain controls are created without associated private data. An attacker could potentially trigger a NULL dereference, leading to system instability or a Denial of Service (DoS).

Red Hat Enterprise Linux 10 Fix deferred kernel Red Hat Enterprise Linux 6 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel-rt Red Hat Enterprise Linux 8 Fix deferred kernel Red Hat Enterprise Linux 8 Fix deferred kernel-rt Red Hat Enterprise Linux 9 Fix deferred kernel Red Hat Enterprise Linux 9 Fix deferred kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-53350 https://nvd.nist.gov/vuln/detail/CVE-2026-53350 https://lore.kernel.org/linux-cve-announce/2026070146-CVE-2026-53350-dcd9@gregkh/T