{"id":"CVE-2026-44323","state":"PUBLISHED","title":"free5GC: UDR nudr-dr DELETE amf-subscriptions panics on missing subsId when UE state exists (nil pointer dereference)","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 contains a nil-pointer dereference reachable from a single authenticated request, after one preparatory authenticated EE-subscription create. The handler checks _, ok = UESubsData.EeSubscriptionCollection[subsId] and sets a 404 problem-details on the miss path, but then continues to UESubsData.EeSubscriptionCollection[subsId].AmfSubscriptionInfos -- dereferencing the same missing entry instead of returning. Gin recovery converts the panic into HTTP 500, but the endpoint remains repeatedly panicable. This vulnerability is fixed in 4.2.2.","publishedAt":"2026-05-27T15:45:14.218Z","updatedAt":"2026-06-01T17:08:45.474Z","severity":{"score":4.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["free5gc free5gc"],"affected":[{"vendor":"free5gc","product":"free5gc","versions":[{"version":"< 4.2.2","status":"affected"}]}],"references":["https://github.com/free5gc/free5gc/security/advisories/GHSA-4rqf-grm6-vf75","https://github.com/free5gc/free5gc/issues/919","https://github.com/free5gc/udr/pull/60","https://github.com/free5gc/udr/commit/8a1d3c63be99d378806d771f086ff32f1867da99"],"weaknesses":["CWE-476"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/44xxx/CVE-2026-44323.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-44323","state":"PUBLISHED","datePublished":"2026-05-27T15:45:14.218Z","dateUpdated":"2026-06-01T17:08:45.474Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-05-05T19:00:06.022Z"},"containers":{"cna":{"title":"free5GC: UDR nudr-dr DELETE amf-subscriptions panics on missing subsId when UE state exists (nil pointer dereference)","descriptions":[{"lang":"en","value":"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 contains a nil-pointer dereference reachable from a single authenticated request, after one preparatory authenticated EE-subscription create. The handler checks _, ok = UESubsData.EeSubscriptionCollection[subsId] and sets a 404 problem-details on the miss path, but then continues to UESubsData.EeSubscriptionCollection[subsId].AmfSubscriptionInfos -- dereferencing the same missing entry instead of returning. Gin recovery converts the panic into HTTP 500, but the endpoint remains repeatedly panicable. This vulnerability is fixed in 4.2.2."}],"affected":[{"vendor":"free5gc","product":"free5gc","versions":[{"version":"< 4.2.2","status":"affected"}]}],"references":[{"url":"https://github.com/free5gc/free5gc/security/advisories/GHSA-4rqf-grm6-vf75","name":"https://github.com/free5gc/free5gc/security/advisories/GHSA-4rqf-grm6-vf75","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/free5gc/free5gc/issues/919","name":"https://github.com/free5gc/free5gc/issues/919","tags":["x_refsource_MISC"]},{"url":"https://github.com/free5gc/udr/pull/60","name":"https://github.com/free5gc/udr/pull/60","tags":["x_refsource_MISC"]},{"url":"https://github.com/free5gc/udr/commit/8a1d3c63be99d378806d771f086ff32f1867da99","name":"https://github.com/free5gc/udr/commit/8a1d3c63be99d378806d771f086ff32f1867da99","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-476","lang":"en","description":"CWE-476: NULL Pointer Dereference","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-05-27T15:45:14.218Z"},"source":{"advisory":"GHSA-4rqf-grm6-vf75","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-01T17:04:56.772232Z","id":"CVE-2026-44323","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-01T17:08:45.474Z"}}]}}}