Buffer Overflow Vulnerability in mcba_usb Driver for Linux Kernel
CVE-2025-39985

Currently unrated

Key Information:

Vendor: Linux
Status: Linux
Vendor: CVE Published:; 15 October 2025

What is CVE-2025-39985?

A buffer overflow vulnerability exists in the mcba_usb driver of the Linux kernel, allowing an attacker to exploit invalid MTU settings. The attacker can manipulate the PF_PACKET to bypass CAN framework protections and send oversized CAN XL frames. When these frames are processed without correct length checks, they can overwrite critical memory areas, leading to potential system crashes or unauthorized code execution. The vulnerability has been addressed by enforcing proper handling of MTU settings in the driver, ensuring the interface's MTU does not exceed specified limits.

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