CVE-2025-68753 ALSA: firewire-motu: add bounds check in put_user loop for DSP events
A missing bounds check in the ALSA firewire-motu driver allows buffer overflows, potentially enabling local attackers to execute code or escalate privileges.
- 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-2025-68753?
CVE-2025-68753 is a high-severity memory corruption vulnerability in Linux, published on 5 Jan 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: firewire-motu: add bounds check in put_user loop for DSP events
In the DSP event handling code, a put_user() loop copies event data. When the user buffer size is not aligned to 4 bytes, it could overwrite beyond the buffer boundary.
Fix by adding a bounds check before put_user().
Weakness: CWE-787
Which versions are affected by CVE-2025-68753?
How do I fix CVE-2025-68753?
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-2025-68753 being exploited?
There is no known exploitation of CVE-2025-68753 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2025-68753, DEBIAN-CVE-2025-68753, GHSA-fg49-cm53-vpfx, ROOT-OS-DEBIAN-12-CVE-2025-68753, ROOT-OS-UBUNTU-2404-CVE-2025-68753, UBUNTU-CVE-2025-68753.