CVE-2026-80911 ASoC: SOF: sof-audio: Fix error path in sof_widget_setup_unlocked()
A double decrement of use_count in the Linux kernel SOF audio driver can lead to a use-after-free condition, potentially causing a system crash.
- 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-2026-80911?
CVE-2026-80911 is an use after free vulnerability in Linux, published on 4 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: SOF: sof-audio: Fix error path in sof_widget_setup_unlocked()
If either tplg_ops->dai_config or widget_kcontrol_setup fail during widget setup we would double decrement the use_count of the widget because the sof_widget_free_unlocked() would be called twice, similarly the core_put would be invoked twice as well.
Since the use_count and core_put() is handled within the widget_free function we need to return without falling through the pipe_widget_free label.
The fixes tag is picked to the last change around this part of the code which is adequately old enough for backporting purposes.
Which versions are affected by CVE-2026-80911?
How do I fix CVE-2026-80911?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-80911 being exploited?
There is no known exploitation of CVE-2026-80911 in the wild and no public exploit code.
Sources
Also known as AZL-99470, BELL-CVE-2026-80911, DEBIAN-CVE-2026-80911, GHSA-v4fw-33v9-5mm7, UBUNTU-CVE-2026-80911.