CVE-2026-26024
HIGHCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
3Tags
Description
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).
Analysis
free5GC SMF versions up to 1.4.1 crash when processing malformed PFCP SessionReportRequest messages on the UDP/8805 interface, allowing unauthenticated remote attackers to cause denial of service. Public exploit code exists for this vulnerability, and no upstream patch is currently available. …
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Remediation
Within 24 hours: Inventory all systems running free5GC SMF and document their versions and network exposure. Within 7 days: Implement network segmentation to restrict access to UDP port 8805 (PFCP interface) to authorized nodes only, and enable enhanced monitoring for malformed PFCP packets. …
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