A vulnerability categorized as critical has been discovered in Linux Kernel up to 6.1.167/6.6.133/6.12.80/6.18.21/6.19.11 . Affected by this vulnerability is the function mtype_del of the component netfilter . Executing a manipulation can lead to privilege escalation. This vulnerability appears as CVE-2026-31418 . The attacker needs to be present on the local network. There is no available exploit. It is advisable to upgrade the affected component.