A vulnerability classified as problematic was found in Linux Kernel up to 6.6.77/6.12.13/6.13.2. This vulnerability affects unknown code of the component ipheth. The manipulation of the argument wNdpIndex leads to out-of-bounds read.

This vulnerability was named CVE-2025-21742. The attack needs to be initiated within the local network. There is no exploit available.

It is recommended to upgrade the affected component.