CVE-2026-80966 ALSA: portman2x4: Check card index validity at probe
A missing check in the ALSA portman2x4 driver allows out-of-bounds access, potentially causing crashes or information leaks for local attackers.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-80966?
CVE-2026-80966 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: portman2x4: Check card index validity at probe
Although portman2x4 driver has a check of the given devptr->id value, it doesn't check for a negative id, which is often given as "none" or such value when bound via sysfs. This may lead 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-2026-80966?
How do I fix CVE-2026-80966?
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-2026-80966 being exploited?
There is no known exploitation of CVE-2026-80966 in the wild and no public exploit code.
Sources
Also known as AZL-100620, BELL-CVE-2026-80966, DEBIAN-CVE-2026-80966, GHSA-q972-jx45-qf27, UBUNTU-CVE-2026-80966.