CVE-2026-31776 ALSA: ctxfi: Fix missing SPDIFI1 index handling
A missing index check in the ALSA ctxfi driver allows out-of-bounds array access, potentially leading to memory corruption or system crashes.
- 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-2026-31776?
CVE-2026-31776 is a high-severity memory corruption vulnerability in Linux kernel, published on 1 May 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: ctxfi: Fix missing SPDIFI1 index handling
SPDIF1 DAIO type isn't properly handled in daio_device_index() for hw20k2, and it returned -EINVAL, which ended up with the out-of-bounds array access. Follow the hw20k1 pattern and return the proper index for this type, too.
Weakness: CWE-129
Which versions are affected by CVE-2026-31776?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-31776?
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-2026-31776 being exploited?
There is no known exploitation of CVE-2026-31776 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2026-31776, GHSA-23v5-vgf6-5452, ROOT-OS-DEBIAN-11-CVE-2026-31776, ROOT-OS-UBUNTU-2204-CVE-2026-31776, ROOT-OS-UBUNTU-2404-CVE-2026-31776, UBUNTU-CVE-2026-31776.