CVE-2026-23334 can: usb: f81604: handle short interrupt urb messages properly
A flaw in the Linux kernel CAN USB driver fails to handle short interrupt messages, potentially causing a denial of service.
- 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-2026-23334?
CVE-2026-23334 is a medium-severity denial of service vulnerability in Linux kernel, published on 25 Mar 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:
can: usb: f81604: handle short interrupt urb messages properly
If an interrupt urb is received that is not the correct length, properly detect it and don't attempt to treat the data as valid.
Which versions are affected by CVE-2026-23334?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-23334?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-23334 being exploited?
There is no known exploitation of CVE-2026-23334 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-23334, DEBIAN-CVE-2026-23334, GHSA-2x56-x8gq-8cv3, ROOT-OS-DEBIAN-13-CVE-2026-23334, ROOT-OS-UBUNTU-2204-CVE-2026-23334, ROOT-OS-UBUNTU-2404-CVE-2026-23334 and 1 more.