A vulnerability has been found in Linux Kernel up to 6.6.135/6.12.82/6.18.23/6.19.13 and classified as critical. This impacts the function l2tp_xmit_core in the library /include/linux/udp.h of the component l2tp. This manipulation causes infinite loop.

This vulnerability is registered as CVE-2026-43080. The attack requires access to the local network. No exploit is available.

The affected component should be upgraded.