{"id":"CVE-2026-44319","revision":"9b4216890ba04b3380a3bcfeaf4b5bc8","records":[{"revision":"9b4216890ba04b3380a3bcfeaf4b5bc8","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-44319","aliases":[],"title":"free5GC: NEF crashes via logger.Fatal on PFD notification delivery failure (attacker-controlled notifyUri)","description":"free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF terminates the entire process when a stored PFD-subscription notifyUri cannot be reached. In PfdChangeNotifier.FlushNotifications(), the notifier calls NnefPFDmanagementNotify(...) and on any delivery error invokes logger.PFDManageLog.Fatal(err), which is os.Exit(1)-equivalent in Go. An attacker who can create a PFD subscription with an attacker-chosen notifyUri and then trigger a PFD change can deterministically kill NEF on the asynchronous delivery attempt -- the process exits with status 1, dropping NEF's entire SBI surface until restart. This vulnerability is fixed in 4.2.2.","state":0,"publishedAt":"2026-05-27T15:49:20.934+00:00","modifiedAt":"2026-05-28T14:15:51.359+00:00","affected":[{"ecosystem":"Vendor product","name":"free5gc","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"free5gc\",\n                    \"product\": \"free5gc\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 4.2.2\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/free5gc/free5gc/security/advisories/GHSA-rxrq-fv76-26pr","https://github.com/free5gc/free5gc/issues/924","https://github.com/free5gc/nef/pull/25","https://github.com/free5gc/nef/commit/f110517b1189801950b50668a593398687049074"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-44319","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-44319","identifiers":["CVE-2026-44319"]},"retained":false,"historicalAffected":[]}],"coverage":[]}