CVE-2026-31777 ALSA: ctxfi: Check the error for index mapping
Missing error check in the ALSA ctxfi driver can lead to a null pointer dereference, causing a system crash.
- 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-2026-31777?
CVE-2026-31777 is a medium-severity 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: Check the error for index mapping
The ctxfi driver blindly assumed a proper value returned from daio_device_index(), but it's not always true. Add a proper error check to deal with the error from the function.
Which versions are affected by CVE-2026-31777?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-31777?
Apply the vendor's patch.
Is CVE-2026-31777 being exploited?
There is no known exploitation of CVE-2026-31777 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-31777, DEBIAN-CVE-2026-31777, GHSA-wg4g-3863-r8m4, ROOT-OS-DEBIAN-11-CVE-2026-31777, ROOT-OS-DEBIAN-12-CVE-2026-31777, ROOT-OS-DEBIAN-13-CVE-2026-31777 and 3 more.