CVE-2026-80872 ALSA: hda/tas2781: Cancel async firmware request at unbind
A race condition in the TAS2781 HDA driver allows use-after-free during device unbind, potentially causing system crashes or code execution.
- 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-2026-80872?
CVE-2026-80872 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:
ALSA: hda/tas2781: Cancel async firmware request at unbind
TAS2781 HDA I2C and SPI queue RCA firmware loading from component bind with request_firmware_nowait(). The firmware loader keeps the callback module pinned and holds a device reference, but the callback still uses driver-private HDA state.
Component unbind removes controls and DSP state immediately. Later device removal tears down the TAS2781 private data, including codec_lock. If the async firmware callback runs after unbind has started, it can operate on state that is being torn down.
Cancel or synchronize the async firmware request before removing controls and DSP state. A queued callback is cancelled, and an already-running callback is allowed to finish before unbind continues.
Which versions are affected by CVE-2026-80872?
How do I fix CVE-2026-80872?
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-2026-80872 being exploited?
There is no known exploitation of CVE-2026-80872 in the wild and no public exploit code.
Sources
Also known as AZL-99489, BELL-CVE-2026-80872, DEBIAN-CVE-2026-80872, GHSA-cwhx-gq4m-wm56, UBUNTU-CVE-2026-80872.