CVE-2025-39696 ALSA: hda: tas2781: Fix wrong reference of tasdevice_priv
A wrong pointer reference in the ALSA HDA tas2781 driver causes memory corruption and system crashes, requiring a kernel patch.
- 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-2025-39696?
CVE-2025-39696 is a high-severity memory corruption vulnerability in Linux kernel, published on 5 Sep 2025. 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: hda: tas2781: Fix wrong reference of tasdevice_priv
During the conversion to unify the calibration data management, the reference to tasdevice_priv was wrongly set to h->hda_priv instead of h->priv. This resulted in memory corruption and crashes eventually. Unfortunately it's a void pointer, hence the compiler couldn't know that it's wrong.
Which versions are affected by CVE-2025-39696?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-39696?
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-2025-39696 being exploited?
There is no known exploitation of CVE-2025-39696 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-39696, DEBIAN-CVE-2025-39696, GHSA-2cq2-6rr9-jjr9, UBUNTU-CVE-2025-39696.