CVE-2026-93184 ASoC: fsl_audmix: rework runtime PM handling in probe
A flaw in the Linux kernel's fsl_audmix driver causes a system hang when register writes occur before hardware power-up during probe.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-93184?
CVE-2026-93184 is a denial of service vulnerability in Linux, published on 17 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
ASoC: fsl_audmix: rework runtime PM handling in probe
After pm_runtime_enable() the AUDMIX block is powered off and stays suspended until the first runtime resume. Register writes issued between probe() and the first resume (e.g. from DAPM or ALSA control paths) target unpowered hardware and cause a system hang.
Fix this by calling pm_runtime_resume_and_get() immediately after pm_runtime_enable() to power the hardware up and enable its clocks. Release the reference afterwards with pm_runtime_put() to allow the runtime PM framework to suspend the device and switch the regmap to cache-only mode when idle.
When CONFIG_PM is disabled or runtime PM is not enabled, pm_runtime_* calls are stubs that do not power up the hardware. Handle this case explicitly by calling fsl_audmix_runtime_resume() directly so the hardware is always initialised and its clocks are enabled, ensuring register accesses succeed regardless of PM configuration.
Which versions are affected by CVE-2026-93184?
How do I fix CVE-2026-93184?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-93184 being exploited?
There is no known exploitation of CVE-2026-93184 in the wild and no public exploit code.
Sources
Also known as AZL-102801, BELL-CVE-2026-93184, DEBIAN-CVE-2026-93184, GHSA-88wf-2wr7-wjcj, UBUNTU-CVE-2026-93184.