A vulnerability classified as problematic was found in Linux Kernel up to 5.4.155/5.10.75/5.14.14. This vulnerability affects the function j1939_netdev_start in the library lib/refcount.c. The manipulation leads to use after free.

This vulnerability was named CVE-2021-47459. The attack needs to be done within the local network. There is no exploit available.

It is recommended to upgrade the affected component.