CVE-2026-80964 ALSA: virmidi: Check card index validity at probe
A local attacker can trigger an out-of-bounds access in the ALSA virmidi driver via sysfs, potentially causing a system crash or code execution.
- 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-2026-80964?
CVE-2026-80964 is a memory corruption vulnerability in Linux, published on 11 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: virmidi: Check card index validity at probe
virmidi driver blindly trusts that the given devptr->id value is within the proper card index range at probe. It's OK for the devices the driver itself creates at the module probe time, but if the device is bound manually via sysfs interface, this could be -1 as "none", and this leads to OOB access for index[] and other parameters.
Add a sanity check for the card index and warn/correct it if it's a value out of the range.
Which versions are affected by CVE-2026-80964?
How do I fix CVE-2026-80964?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-80964 being exploited?
There is no known exploitation of CVE-2026-80964 in the wild and no public exploit code.
Sources
Also known as AZL-100634, BELL-CVE-2026-80964, DEBIAN-CVE-2026-80964, GHSA-hvhj-8cmg-w82m, UBUNTU-CVE-2026-80964.