CVE-2026-25501: medium-severity vulnerability in free5gc smf
free5GC SMF crash (nil pointer dereference) on PFCP SessionReportRequest when ReportType.DLDR is set but DownlinkDataReport IE is missing
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.6epss 0.4%
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 due to nil pointer dereference and the SMF process terminates. This is triggered by a malformed PFCP SessionReportRequest on the SMF 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).
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U
Affected products
free5gc · smfRelated CVEs — free5gc smf
In the same product, most dangerous first.
CVE-2025-69232LOWfree5GC hasProtocol Compliance Violation in UPF Leading to SMF Service DisruptionEPSS 0.4%CVE-2026-26025MEDIUMfree5GC SMF crash (nil pointer dereference) on PFCP SessionReportRequest when ReportType.USAR=1 and UsageReport omits mandatory URRID sub-IE EPSS 0.4%CVE-2026-26024MEDIUMfree5GC SMF crash (nil pointer dereference) on PFCP SessionReportRequest when ReportType.USAR=1 and UsageReport omits mandatory URRID sub-IE EPSS 0.4%