{"id":"CVE-2026-44324","revision":null,"records":[{"revision":"0ca10fa9201b4ab8aa02f1559a50dcf4","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-44324","aliases":[],"title":"free5GC: UDR nudr-dr DELETE amf-subscriptions panics on missing UE state via nil interface type assertion (single authenticated request)","description":"free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's UDR nudr-dr DELETE /subscription-data/{ueId}/{servingPlmnId}/ee-subscriptions/{subsId}/amf-subscriptions handler panics on a single authenticated request against a fresh UDR instance when the supplied ueId does not exist in UESubsCollection. The processor checks value, ok := udrSelf.UESubsCollection.Load(ueId) and sets a 404 USER_NOT_FOUND problem-details on the miss path, but execution continues and immediately runs value.(*udr_context.UESubsData) -- a Go type assertion on a nil interface, which panics with interface conversion: interface {} is nil, not *context.UESubsData. Gin recovery converts the panic into HTTP 500, but the endpoint remains repeatedly panicable. This vulnerability is fixed in 4.2.2.","state":0,"publishedAt":"2026-05-27T15:44:27.616+00:00","modifiedAt":"2026-05-28T14:38:09.624+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:L/UI:N/S:U/C:N/I:N/A:H","score":6.5,"severity":"MEDIUM"}],"references":["https://github.com/free5gc/free5gc/security/advisories/GHSA-jqfc-gwj5-3w63","https://github.com/free5gc/free5gc/issues/920","https://github.com/free5gc/udr/pull/60","https://github.com/free5gc/udr/commit/8a1d3c63be99d378806d771f086ff32f1867da99"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-44324","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-44324","identifiers":["CVE-2026-44324"]},"retained":false,"historicalAffected":[]},{"revision":"6315fde42fde4f35bae5d09e75dfbbc3","observedAt":"2026-11-09T11:03:47.205+00:00","statement":{"source":"euvd","id":"EUVD-2026-32574","aliases":["CVE-2026-44324","GHSA-jqfc-gwj5-3w63"],"title":"free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's UDR nudr-dr DELETE /subscription-data/{ueId}/{servingPlmnId}/ee-subscriptions/{subsId}/amf-subscriptions handler panics on a single authenticated req…","description":"free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's UDR nudr-dr DELETE /subscription-data/{ueId}/{servingPlmnId}/ee-subscriptions/{subsId}/amf-subscriptions handler panics on a single authenticated request against a fresh UDR instance when the supplied ueId does not exist in UESubsCollection. The processor checks value, ok := udrSelf.UESubsCollection.Load(ueId) and sets a 404 USER_NOT_FOUND problem-details on the miss path, but execution continues and immediately runs value.(*udr_context.UESubsData) -- a Go type assertion on a nil interface, which panics with interface conversion: interface {} is nil, not *context.UESubsData. Gin recovery converts the panic into HTTP 500, but the endpoint remains repeatedly panicable. This vulnerability is fixed in 4.2.2.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":6.5,"severity":null}],"references":["https://github.com/free5gc/free5gc/security/advisories/GHSA-jqfc-gwj5-3w63","https://github.com/free5gc/free5gc/issues/920","https://github.com/free5gc/udr/pull/60","https://github.com/free5gc/udr/commit/8a1d3c63be99d378806d771f086ff32f1867da99"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-32574","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"May 27, 2026, 3:44:27 PM","dateUpdated":"May 28, 2026, 2:38:09 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-32574","identifiers":["EUVD-2026-32574","CVE-2026-44324","GHSA-jqfc-gwj5-3w63"]},"retained":false,"historicalAffected":[]},{"revision":"d0d1f12efddd48f7847dcfdced9bb69a","observedAt":"2026-10-25T10:17:21.823+00:00","statement":{"source":"nvd","id":"CVE-2026-44324","aliases":[],"title":"free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's UDR nudr-dr DELETE /subscription-data/{ueId}/{servingPlmnId}/ee-subscriptions/{subsId}/amf-subscriptions handler panics on a single authenticated req…","description":"free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's UDR nudr-dr DELETE /subscription-data/{ueId}/{servingPlmnId}/ee-subscriptions/{subsId}/amf-subscriptions handler panics on a single authenticated request against a fresh UDR instance when the supplied ueId does not exist in UESubsCollection. The processor checks value, ok := udrSelf.UESubsCollection.Load(ueId) and sets a 404 USER_NOT_FOUND problem-details on the miss path, but execution continues and immediately runs value.(*udr_context.UESubsData) -- a Go type assertion on a nil interface, which panics with interface conversion: interface {} is nil, not *context.UESubsData. Gin recovery converts the panic into HTTP 500, but the endpoint remains repeatedly panicable. This vulnerability is fixed in 4.2.2.","state":0,"publishedAt":"2026-05-27T17:16:37.767+00:00","modifiedAt":"2026-10-14T20:10:00.19+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":6.5,"severity":"MEDIUM"}],"references":["https://github.com/free5gc/free5gc/issues/920","https://github.com/free5gc/free5gc/security/advisories/GHSA-jqfc-gwj5-3w63","https://github.com/free5gc/udr/commit/8a1d3c63be99d378806d771f086ff32f1867da99","https://github.com/free5gc/udr/pull/60"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-44324","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-704","CWE-754"],"productCriteria":["cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2026-05-27T17:16:37.767","lastModified":"2026-10-14T20:10:00.190"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-44324","identifiers":["CVE-2026-44324"]},"retained":false,"historicalAffected":[]},{"revision":"0479df1c80d2460088951322541a4212","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-jqfc-gwj5-3w63","aliases":["CVE-2026-44324","GO-2026-5478"],"title":"free5GC's UDR nudr-dr DELETE amf-subscriptions panics on missing UE state via nil interface type assertion (single authenticated request)","description":"### Summary\nfree5GC's UDR `nudr-dr` `DELETE /subscription-data/{ueId}/{servingPlmnId}/ee-subscriptions/{subsId}/amf-subscriptions` handler panics on a single authenticated request against a fresh UDR instance when the supplied `ueId` does not exist in `UESubsCollection`. The processor checks `value, ok := udrSelf.UESubsCollection.Load(ueId)` and sets a `404 USER_NOT_FOUND` problem-details on the miss path, but execution continues and immediately runs `value.(*udr_context.UESubsData)` -- a Go type assertion on a nil interface, which panics with `interface conversion: interface {} is nil, not *context.UESubsData`. Gin recovery converts the panic into `HTTP 500`, but the endpoint remains repeatedly panicable.\n\nThis is the no-precondition sibling of free5gc/free5gc#919: same handler, same bug pattern (set `pd`, do not return, then dereference), but the panic site is the nil-interface type assertion at line 61 instead of the nil-pointer deref at line 69. No earlier EE-subscription create is required.\n\nThis endpoint requires a valid `nudr-dr` OAuth2 access token (PR:L, NOT PR:N), so this is scored as an authenticated panic-DoS, not as an unauth-bypass finding.\n\n### Details\nValidated against the UDR container in the official Docker compose lab.\n- Source repo tag: `v4.2.1`\n- Running Docker image: `free5gc/udr:v4.2.1`\n- Runtime UDR commit: `754d23b0`\n- Docker validation date: 2026-03-22\n- UDR endpoint: `http://10.100.200.11:8000`\n\nVulnerable handler (the `ok` miss path sets `pd` but does not return; the next line type-asserts the nil interface):\n```go\nsubsId := c.Params.ByName(\"subsId\")\ns.Processor().RemoveAmfSubscriptionsInfoProcedure(c, subsId, ueId)\n```\nIn the processor:\n```go\nvalue, ok := udrSelf.UESubsCollection.Load(ueId)\nif !ok {\n    pd = util.ProblemDetailsNotFound(\"USER_NOT_FOUND\")\n}\n\nUESubsData := value.(*udr_context.UESubsData)   // panics: nil interface\n```\nWhen `ueId` is absent from `UESubsCollection`, `value` is the nil `interface{}` returned by `sync.Map.Load`, and `value.(*udr_context.UESubsData)` panics with:\n```\npanic: interface conversion: interface {} is nil, not *context.UESubsData\n```\n\nCode evidence (paths in `free5gc/udr`):\n- Route exposure + handler dispatch:\n  - `NFs/udr/internal/sbi/api_datarepository.go:2161`\n  - `NFs/udr/internal/sbi/api_datarepository.go:2170`\n  - `NFs/udr/internal/sbi/api_datarepository.go:2172`\n- Panic root cause (nil interface type assertion):\n  - `NFs/udr/internal/sbi/processor/event_amf_subscription_info_document.go:53`\n  - `NFs/udr/internal/sbi/processor/event_amf_subscription_info_document.go:56`\n  - `NFs/udr/internal/sbi/processor/event_amf_subscription_info_document.go:61`\n\n### PoC\nReproduced end-to-end against the running UDR at `http://10.100.200.11:8000` -- single authenticated request, no preconditions.\n\n1. Restart UDR (clean state -- proves no precondition is needed):\n```\ndocker restart udr\n```\n\n2. Obtain a valid `nudr-dr` token from NRF:\n```\ncurl -sS -X POST 'http://10.100.200.3:8000/oauth2/token' \\\n  -H 'Content-Type: application/x-www-form-urlencoded' \\\n  --data 'grant_type=client_credentials&nfType=NEF&nfInstanceId=eb9990de-4cd3-41b0-b5d9-c2102b088c57&targetNfType=UDR&scope=nudr-dr'\n```\n\n3. Trigger the panic with one DELETE for a nonexistent `ueId=x`:\n```\ncurl -i -sS -X DELETE \\\n  'http://10.100.200.11:8000/nudr-dr/v2/subscription-data/x/bad/ee-subscriptions/x/amf-subscriptions' \\\n  -H 'Authorization: Bearer <valid_nudr_dr_jwt>'\n```\n```\nHTTP/1.1 500 Internal Server Error\nContent-Length: 0\n```\n\n4. UDR container logs (`docker logs udr`) confirm the nil-interface conversion panic at `event_amf_subscription_info_document.go:61` inside `RemoveAmfSubscriptionsInfoProcedure`:\n```\n[ERRO][UDR][GIN] panic: interface conversion: interface {} is nil, not *context.UESubsData\ngithub.com/free5gc/udr/internal/sbi/processor.(*Processor).RemoveAmfSubscriptionsInfoProcedure\n    .../event_amf_subscription_info_document.go:61\ngithub.com/free5gc/udr/internal/sbi.(*Server).HandleRemoveAmfSubscriptionsInfo\n    .../api_datarepository.go:2172\n[INFO][UDR][GIN] | 500 | DELETE | /nudr-dr/v2/subscription-data/x/bad/ee-subscriptions/x/amf-subscriptions |\n```\n\n### Impact\nIncorrect type conversion on a nil interface (CWE-704) inside an authenticated UDR data-repository handler, caused by improper handling of the missing-ueId branch (CWE-754): the handler sets a `404` problem-details value but does not return, then runs a Go type assertion on the nil interface returned by `sync.Map.Load`.\n\nThis is NOT framed as an auth-bypass finding: the endpoint requires a valid `nudr-dr` OAuth2 access token. A network attacker who already holds (or can obtain) a valid token can:\n- Trigger a reliable, single-request panic on the `amf-subscriptions` delete route against a fresh UDR (no preparatory state needed -- this is strictly easier than free5gc/free5gc#919).\n- Repeat the trigger to sustain a per-request panic-DoS on UDR's data-repository surface, with each panic costing more CPU + log writes than the intended `404 USER_NOT_FOUND` response would have.\n\nNo Confidentiality impact (the response is `500` with empty body). No Integrity impact (the panic happens before any state mutation). Availability impact is limited to per-request degradation (Gin recovers; the UDR process keeps running).\n\nAffected: free5gc v4.2.1.\n\nUpstream issue: https://github.com/free5gc/free5gc/issues/920\nUpstream fix: https://github.com/free5gc/udr/pull/60","state":0,"publishedAt":"2026-05-08T22:52:20+00:00","modifiedAt":"2026-06-25T23:11:42.0017542+00:00","affected":[{"ecosystem":"Go","name":"github.com/free5gc/udr","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.4.3"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/free5gc/free5gc/security/advisories/GHSA-jqfc-gwj5-3w63","https://nvd.nist.gov/vuln/detail/CVE-2026-44324","https://github.com/free5gc/free5gc/issues/920","https://github.com/free5gc/udr/pull/60","https://github.com/free5gc/udr/commit/8a1d3c63be99d378806d771f086ff32f1867da99","https://github.com/free5gc/free5gc"],"sourceUrl":"https://github.com/advisories/GHSA-jqfc-gwj5-3w63","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-jqfc-gwj5-3w63","identifiers":["GHSA-jqfc-gwj5-3w63","CVE-2026-44324","GO-2026-5478"]},"retained":false,"historicalAffected":[]},{"revision":"07e179a539dd4c1a9f38d93c4f2dadff","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-5478","aliases":["CVE-2026-44324","GHSA-jqfc-gwj5-3w63"],"title":"free5GC's UDR nudr-dr DELETE amf-subscriptions panics on missing UE state via nil interface type assertion (single authenticated request) in github.com/free5gc/udr","description":"free5GC's UDR nudr-dr DELETE amf-subscriptions panics on missing UE state via nil interface type assertion (single authenticated request) in github.com/free5gc/udr","state":0,"publishedAt":"2026-06-25T22:34:31+00:00","modifiedAt":"2026-06-25T23:01:14.8808701+00:00","affected":[{"ecosystem":"Go","name":"github.com/free5gc/udr","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.4.3"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/free5gc/free5gc/security/advisories/GHSA-jqfc-gwj5-3w63","https://nvd.nist.gov/vuln/detail/CVE-2026-44324","https://github.com/free5gc/udr/commit/8a1d3c63be99d378806d771f086ff32f1867da99","https://github.com/free5gc/udr/pull/60","https://github.com/free5gc/free5gc/issues/920"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-5478","license":"OSV · upstream source license applies","key":"osv:GO-2026-5478","identifiers":["GO-2026-5478","CVE-2026-44324","GHSA-jqfc-gwj5-3w63"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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