CVE-2025-68347 ALSA: firewire-motu: fix buffer overflow in hwdep read for DSP events
A buffer overflow in the Linux kernel's ALSA firewire-motu driver allows local attackers to potentially execute code or escalate privileges via crafted DSP events.
- 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-2025-68347?
CVE-2025-68347 is a high-severity memory corruption vulnerability in Linux, published on 24 Dec 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: firewire-motu: fix buffer overflow in hwdep read for DSP events
The DSP event handling code in hwdep_read() could write more bytes to the user buffer than requested, when a user provides a buffer smaller than the event header size (8 bytes).
Fix by using min_t() to clamp the copy size, This ensures we never copy more than the user requested.
Which versions are affected by CVE-2025-68347?
How do I fix CVE-2025-68347?
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-2025-68347 being exploited?
There is no known exploitation of CVE-2025-68347 in the wild and no public exploit code.
Sources
Also known as AZL-73096, BELL-CVE-2025-68347, DEBIAN-CVE-2025-68347, GHSA-h6xr-332m-px9v, ROOT-OS-UBUNTU-2404-CVE-2025-68347, UBUNTU-CVE-2025-68347.