CVE-2026-64484 ALSA: es1938: check snd_ctl_new1() return value
A missing null check in the ALSA es1938 driver can cause a kernel crash via null pointer dereference during memory allocation failure.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-64484?
CVE-2026-64484 is a vulnerability in Linux, published on 25 Jul 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: es1938: check snd_ctl_new1() return value
snd_ctl_new1() can return NULL when memory allocation fails. snd_es1938_mixer() does not check the return value before dereferencing the pointer, which can lead to a NULL pointer dereference.
Add a NULL check after snd_ctl_new1() and return -ENOMEM if it fails.
Which versions are affected by CVE-2026-64484?
How do I fix CVE-2026-64484?
Apply the vendor's patch.
Is CVE-2026-64484 being exploited?
There is no known exploitation of CVE-2026-64484 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-64484, DEBIAN-CVE-2026-64484, GHSA-783r-hxwf-2cjj, ROOT-OS-UBUNTU-2204-CVE-2026-64484, UBUNTU-CVE-2026-64484.