CVE-2026-26024: FREE5GC Smf

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

free5GC SMF provides Session Management Function for free5GC, an open-source project for 5th generation (5G) mobile core networks. In versions up to and including 1.4.1, SMF panics and terminates when processing a malformed PFCP SessionReportRequest on the PFCP (UDP/8805) interface. No known upstream fix is available, but some workarounds are available. ACL/firewall the PFCP interface so only trusted UPF IPs can reach SMF (reduce spoofing/abuse surface); drop/inspect malformed PFCP SessionReportRequest messages at the network edge where feasible, and/or add recover() around PFCP handler dispatch to avoid whole-process termination (mitigation only).

Affected products

• FREE5GC Smf: up to and including 1.4.1

Published 2026-02-24. Last modified 2026-06-17.