{"id":"CVE-2026-26024","summary":"free5GC SMF crash (nil pointer dereference) on PFCP SessionReportRequest when ReportType.USAR=1 and UsageReport omits mandatory URRID sub-IE ","details":"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).","aliases":["GHSA-mrv4-m9wc-c4g9"],"modified":"2026-04-02T13:18:54.168201Z","published":"2026-02-24T00:12:05.436Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-476"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26024.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26024.json"},{"type":"ADVISORY","url":"https://github.com/free5gc/free5gc/security/advisories/GHSA-mrv4-m9wc-c4g9"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26024"},{"type":"REPORT","url":"https://github.com/free5gc/free5gc/issues/807"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/free5gc/smf","events":[{"introduced":"0"},{"last_affected":"df5818d03d12853d19e7c5a95aa980a15b81d18c"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"1.4.1"}]}}],"versions":["v1.0.0","v1.0.1","v1.0.2","v1.1.0","v1.1.1","v1.2.0","v1.2.1","v1.2.2","v1.2.3","v1.2.4","v1.2.5","v1.2.6","v1.2.7","v1.3.0","v1.3.1","v1.3.2","v1.4.0","v1.4.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26024.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"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"}]}