CVE-2025-39985

In CVE-2025-39985, the Linux kernel mcba_usb driver fails to populate net_device_ops->ndo_change_mtu(), allowing an attacker using PF_PACKET (ETH_P_CANXL) to set an invalid MTU (e.g., can0 mtu 9999). The PF_PACKET framework only verifies skb->len against the interface MTU, so a crafted CAN ...