{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-44319", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-05T19:00:06.022Z", "datePublished": "2026-05-27T15:49:20.934Z", "dateUpdated": "2026-05-27T15:49:20.934Z"}, "containers": {"cna": {"title": "free5GC: NEF crashes via logger.Fatal on PFD notification delivery failure (attacker-controlled notifyUri)", "problemTypes": [{"descriptions": [{"cweId": "CWE-20", "lang": "en", "description": "CWE-20: Improper Input Validation", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-617", "lang": "en", "description": "CWE-617: Reachable Assertion", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-755", "lang": "en", "description": "CWE-755: Improper Handling of Exceptional Conditions", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/free5gc/free5gc/security/advisories/GHSA-rxrq-fv76-26pr", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/free5gc/free5gc/security/advisories/GHSA-rxrq-fv76-26pr"}, {"name": "https://github.com/free5gc/free5gc/issues/924", "tags": ["x_refsource_MISC"], "url": "https://github.com/free5gc/free5gc/issues/924"}, {"name": "https://github.com/free5gc/nef/pull/25", "tags": ["x_refsource_MISC"], "url": "https://github.com/free5gc/nef/pull/25"}, {"name": "https://github.com/free5gc/nef/commit/f110517b1189801950b50668a593398687049074", "tags": ["x_refsource_MISC"], "url": "https://github.com/free5gc/nef/commit/f110517b1189801950b50668a593398687049074"}], "affected": [{"vendor": "free5gc", "product": "free5gc", "versions": [{"version": "< 4.2.2", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-27T15:49:20.934Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-rxrq-fv76-26pr", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-44319", "lastModified": "2026-05-27T17:16:37.033", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-05-27T17:16:37.033", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/free5gc/free5gc/issues/924"}, {"source": "security-advisories@github.com", "url": "https://github.com/free5gc/free5gc/security/advisories/GHSA-rxrq-fv76-26pr"}, {"source": "security-advisories@github.com", "url": "https://github.com/free5gc/nef/commit/f110517b1189801950b50668a593398687049074"}, {"source": "security-advisories@github.com", "url": "https://github.com/free5gc/nef/pull/25"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}, {"lang": "en", "value": "CWE-617"}, {"lang": "en", "value": "CWE-755"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}