CVE-2021-4439 | Linux Kernel up to 5.14.14 isdn kcapi.c cmtp_add_connection array index

A vulnerability classified as critical was found in Linux Kernel up to 5.14.14. Affected by this vulnerability is the function cmtp_add_connection of the file drivers/isdn/capi/kcapi.c of the component isdn. The manipulation leads to improper validation of array index.

This vulnerability is known as CVE-2021-4439. The attack needs to be initiated within the local network. There is no exploit available.

It is recommended to upgrade the affected component.