{"id":"CVE-2026-44328","revision":"f3c3f4389fdd4154ad384d5ec776ece4","records":[{"revision":"f3c3f4389fdd4154ad384d5ec776ece4","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-44328","aliases":[],"title":"free5GC: SMF UPI DELETE /upi/v1/upNodesLinks/{ref} panics on AN-node deletion via nil UPF dereference; unauthenticated, state-mutating","description":"free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's SMF mounts the UPI management route group without inbound OAuth2 middleware. On top of that, the DELETE /upi/v1/upNodesLinks/{upNodeRef} handler unconditionally dereferences upNode.UPF after the type-guarded async release, even though AN-typed nodes are constructed without a UPF object. As a result, a single unauthenticated DELETE /upi/v1/upNodesLinks/gNB1 request crashes the handler with a nil-pointer panic AND mutates the in-memory user-plane topology before panicking (the UpNodeDelete(upNodeRef) line runs first). This is an unauthenticated, state-mutating panic-DoS sink that an off-path network attacker can trigger by name against any AN entry. This vulnerability is fixed in 4.2.2.","state":0,"publishedAt":"2026-05-27T15:39:44.153+00:00","modifiedAt":"2026-05-27T17:42:00.534+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:L/A:H","score":8.2,"severity":"HIGH"}],"references":["https://github.com/free5gc/free5gc/security/advisories/GHSA-p9mg-74mg-cwwr","https://github.com/free5gc/free5gc/issues/905","https://github.com/free5gc/smf/pull/199","https://github.com/free5gc/smf/commit/b57bc48081c3d3a2f333d02eb78e4fd31a120deb"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-44328","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-44328","identifiers":["CVE-2026-44328"]},"retained":false,"historicalAffected":[]}],"coverage":[]}