CVE-2026-72445 ALSA: usb-audio: qcom: clear opened when stream enable fails
A local attacker can cause a denial of service in the Linux kernel's USB audio driver by triggering a stream enable failure that leaves the substream wedged.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-72445?
CVE-2026-72445 is a denial of service vulnerability in Linux, published on 15 Aug 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: usb-audio: qcom: clear opened when stream enable fails
On enable, subs->opened is set before the service_interval is validated; an invalid interval jumps to the response label without clearing it, so the substream is wedged at -EBUSY until a disable or disconnect.
Clear subs->opened on the enable error path.
Which versions are affected by CVE-2026-72445?
How do I fix CVE-2026-72445?
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-2026-72445 being exploited?
There is no known exploitation of CVE-2026-72445 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-72445, DEBIAN-CVE-2026-72445, GHSA-xhxj-2g9f-jjcr, UBUNTU-CVE-2026-72445.