{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-4531", "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "state": "PUBLISHED", "assignerShortName": "VulDB", "dateReserved": "2026-03-21T07:47:21.184Z", "datePublished": "2026-03-22T01:32:11.642Z", "dateUpdated": "2026-03-23T15:34:56.907Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "shortName": "VulDB", "dateUpdated": "2026-03-22T01:32:11.642Z"}, "title": "Free5GC AMF handler.go HandleRegistrationComplete denial of service", "problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-404", "lang": "en", "description": "Denial of Service"}]}], "affected": [{"vendor": "n/a", "product": "Free5GC", "versions": [{"version": "4.1.0", "status": "affected"}], "cpes": ["cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:*"], "modules": ["AMF"]}], "descriptions": [{"lang": "en", "value": "A weakness has been identified in Free5GC 4.1.0. Affected is the function HandleRegistrationComplete of the file internal/gmm/handler.go of the component AMF. Executing a manipulation can lead to denial of service. The attack may be performed from remote. This patch is called 52e9386401ce56ea773c5aa587d4cdf7d53da799. It is best practice to apply a patch to resolve this issue."}], "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 6.9, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X", "baseSeverity": "MEDIUM"}}, {"cvssV3_1": {"version": "3.1", "baseScore": 5.3, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C", "baseSeverity": "MEDIUM"}}, {"cvssV3_0": {"version": "3.0", "baseScore": 5.3, "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C", "baseSeverity": "MEDIUM"}}, {"cvssV2_0": {"version": "2.0", "baseScore": 5, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P/E:ND/RL:OF/RC:C"}}], "timeline": [{"time": "2026-03-21T00:00:00.000Z", "lang": "en", "value": "Advisory disclosed"}, {"time": "2026-03-21T01:00:00.000Z", "lang": "en", "value": "VulDB entry created"}, {"time": "2026-03-21T08:52:25.000Z", "lang": "en", "value": "VulDB entry last update"}], "credits": [{"lang": "en", "value": "shovon0203 (VulDB User)", "type": "reporter"}], "references": [{"url": "https://vuldb.com/?id.352319", "name": "VDB-352319 | Free5GC AMF handler.go HandleRegistrationComplete denial of service", "tags": ["vdb-entry", "technical-description"]}, {"url": "https://vuldb.com/?ctiid.352319", "name": "VDB-352319 | CTI Indicators (IOB, IOC, TTP, IOA)", "tags": ["signature", "permissions-required"]}, {"url": "https://vuldb.com/?submit.774073", "name": "Submit #774073 | Linux Foundation free5GC 4.1.0 Denial of Service", "tags": ["third-party-advisory"]}, {"url": "https://github.com/free5gc/free5gc/issues/792", "tags": ["issue-tracking"]}, {"url": "https://github.com/free5gc/amf/pull/198", "tags": ["issue-tracking", "patch"]}, {"url": "https://github.com/free5gc/amf/commit/52e9386401ce56ea773c5aa587d4cdf7d53da799", "tags": ["patch"]}, {"url": "https://github.com/free5gc/free5gc/", "tags": ["product"]}], "tags": ["x_open-source"]}, "adp": [{"references": [{"url": "https://github.com/free5gc/free5gc/issues/792", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-03-23T15:34:51.047653Z", "id": "CVE-2026-4531", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-23T15:34:56.907Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"cna": {"tags": ["x_open-source"], "title": "Free5GC AMF handler.go HandleRegistrationComplete denial of service", "credits": [{"lang": "en", "type": "reporter", "value": "shovon0203 (VulDB User)"}], "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 6.9, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X"}}, {"cvssV3_1": {"version": "3.1", "baseScore": 5.3, "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C"}}, {"cvssV3_0": {"version": "3.0", "baseScore": 5.3, "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C"}}, {"cvssV2_0": {"version": "2.0", "baseScore": 5, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P/E:ND/RL:OF/RC:C"}}], "affected": [{"cpes": ["cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:*"], "vendor": "n/a", "modules": ["AMF"], "product": "Free5GC", "versions": [{"status": "affected", "version": "4.1.0"}]}], "timeline": [{"lang": "en", "time": "2026-03-21T00:00:00.000Z", "value": "Advisory disclosed"}, {"lang": "en", "time": "2026-03-21T01:00:00.000Z", "value": "VulDB entry created"}, {"lang": "en", "time": "2026-03-21T08:52:25.000Z", "value": "VulDB entry last update"}], "references": [{"url": "https://vuldb.com/?id.352319", "name": "VDB-352319 | Free5GC AMF handler.go HandleRegistrationComplete denial of service", "tags": ["vdb-entry", "technical-description"]}, {"url": "https://vuldb.com/?ctiid.352319", "name": "VDB-352319 | CTI Indicators (IOB, IOC, TTP, IOA)", "tags": ["signature", "permissions-required"]}, {"url": "https://vuldb.com/?submit.774073", "name": "Submit #774073 | Linux Foundation free5GC 4.1.0 Denial of Service", "tags": ["third-party-advisory"]}, {"url": "https://github.com/free5gc/free5gc/issues/792", "tags": ["issue-tracking"]}, {"url": "https://github.com/free5gc/amf/pull/198", "tags": ["issue-tracking", "patch"]}, {"url": "https://github.com/free5gc/amf/commit/52e9386401ce56ea773c5aa587d4cdf7d53da799", "tags": ["patch"]}, {"url": "https://github.com/free5gc/free5gc/", "tags": ["product"]}], "descriptions": [{"lang": "en", "value": "A weakness has been identified in Free5GC 4.1.0. Affected is the function HandleRegistrationComplete of the file internal/gmm/handler.go of the component AMF. Executing a manipulation can lead to denial of service. The attack may be performed from remote. This patch is called 52e9386401ce56ea773c5aa587d4cdf7d53da799. It is best practice to apply a patch to resolve this issue."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-404", "description": "Denial of Service"}]}], "providerMetadata": {"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "shortName": "VulDB", "dateUpdated": "2026-03-22T01:32:11.642Z"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-4531", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-03-23T15:34:51.047653Z"}}}], "references": [{"url": "https://github.com/free5gc/free5gc/issues/792", "tags": ["exploit"]}], "providerMetadata": {"shortName": "CISA-ADP", "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "dateUpdated": "2026-03-23T15:34:42.697Z"}}]}, "cveMetadata": {"cveId": "CVE-2026-4531", "state": "PUBLISHED", "dateUpdated": "2026-03-22T01:32:11.642Z", "dateReserved": "2026-03-21T07:47:21.184Z", "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "datePublished": "2026-03-22T01:32:11.642Z", "assignerShortName": "VulDB"}, "dataVersion": "5.2"}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "A weakness has been identified in Free5GC 4.1.0. Affected is the function HandleRegistrationComplete of the file internal/gmm/handler.go of the component AMF. Executing a manipulation can lead to denial of service. The attack may be performed from remote. This patch is called 52e9386401ce56ea773c5aa587d4cdf7d53da799. It is best practice to apply a patch to resolve this issue."}], "id": "CVE-2026-4531", "lastModified": "2026-03-23T16:16:51.980", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "cna@vuldb.com", "type": "Secondary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "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:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "cna@vuldb.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.9, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@vuldb.com", "type": "Secondary"}]}, "published": "2026-03-22T02:15:59.270", "references": [{"source": "cna@vuldb.com", "url": "https://github.com/free5gc/amf/commit/52e9386401ce56ea773c5aa587d4cdf7d53da799"}, {"source": "cna@vuldb.com", "url": "https://github.com/free5gc/amf/pull/198"}, {"source": "cna@vuldb.com", "url": "https://github.com/free5gc/free5gc/"}, {"source": "cna@vuldb.com", "url": "https://github.com/free5gc/free5gc/issues/792"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/?ctiid.352319"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/?id.352319"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/?submit.774073"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/free5gc/free5gc/issues/792"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-404"}], "source": "cna@vuldb.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "4.1.0"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Free5GC", "source": "cna", "vendor": "n/a"}, "product": "free5gc", "vendor": "free5gc"}], "created": "2026-03-23T09:46:49.080717+00:00", "updated": "2026-03-23T09:46:49.080791+00:00", "vendors": ["free5gc", "free5gc$PRODUCT$free5gc"]}