CVE-2026-74455 can: peak_usb: validate uCAN receive record lengths
A missing length validation in the Linux kernel peak_usb CAN driver allows attackers with USB access to cause memory corruption, potentially leading to system crashes or code execution.
- 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-2026-74455?
CVE-2026-74455 is a memory corruption vulnerability in Linux, published on 15 Aug 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: peak_usb: validate uCAN receive record lengths
pcan_usb_fd_decode_buf() walks uCAN records packed in one USB receive buffer.
Require each record to contain the fixed header for its type, and verify CAN payload bytes before copying them into the skb.
Which versions are affected by CVE-2026-74455?
How do I fix CVE-2026-74455?
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-2026-74455 being exploited?
There is no known exploitation of CVE-2026-74455 in the wild and no public exploit code.
Sources
Also known as AZL-96144, BELL-CVE-2026-74455, DEBIAN-CVE-2026-74455, GHSA-fm8j-hx94-qc39, UBUNTU-CVE-2026-74455.