CVE-2026-26024

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).

• CWE-476

• https://github.com/free5gc/free5gc/issues/807Exploit, Issue Tracking
• https://github.com/free5gc/free5gc/security/advisories/GHSA-mrv4-m9wc-c4g9Vendor Advisory

Published

Feb 24, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

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