CVE-2025-68290 most: usb: fix double free on late probe failure
A double free and use-after-free in the Linux kernel MOST USB driver allows local attackers to cause denial of service or execute arbitrary code.
- 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-2025-68290?
CVE-2025-68290 is an use after free vulnerability in Linux, published on 16 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:
most: usb: fix double free on late probe failure
The MOST subsystem has a non-standard registration function which frees the interface on registration failures and on deregistration.
This unsurprisingly leads to bugs in the MOST drivers, and a couple of recent changes turned a reference underflow and use-after-free in the USB driver into several double free and a use-after-free on late probe failures.
Which versions are affected by CVE-2025-68290?
How do I fix CVE-2025-68290?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2025-68290 being exploited?
There is no known exploitation of CVE-2025-68290 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2025-68290, DEBIAN-CVE-2025-68290, GHSA-8hc7-qrvq-37hg, ROOT-OS-DEBIAN-12-CVE-2025-68290, ROOT-OS-DEBIAN-13-CVE-2025-68290, ROOT-OS-UBUNTU-2204-CVE-2025-68290 and 2 more.