A vulnerability classified as problematic was found in Linux Kernel up to 6.1.167/6.6.130/6.12.79/6.18.20/6.19.10 . Impacted is the function udp_lib_lport_inuse . Such manipulation leads to privilege escalation. This vulnerability is documented as CVE-2026-31503 . The attack requires being on the local network. There is not any exploit available. Upgrading the affected component is advised.