{"id":"EUVD-2026-32570","enisaUuid":"5b7cd3d3-1deb-3efa-bf49-9bfa50c4778c","description":"free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC\u0027s 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.","datePublished":"May 27, 2026, 3:39:44 PM","dateUpdated":"May 27, 2026, 5:42:00 PM","baseScore":8.2,"baseScoreVersion":"3.1","baseScoreVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","references":"https://github.com/free5gc/free5gc/security/advisories/GHSA-p9mg-74mg-cwwr\nhttps://github.com/free5gc/free5gc/issues/905\nhttps://github.com/free5gc/smf/pull/199\nhttps://github.com/free5gc/smf/commit/b57bc48081c3d3a2f333d02eb78e4fd31a120deb\n","aliases":"CVE-2026-44328\nGHSA-p9mg-74mg-cwwr\n","assigner":"GitHub_M","epss":0.32,"enisaIdProduct":[{"id":"41957b79-4b09-34df-8d82-b44d795ebfb0","product":{"name":"Free5GC","vendor":{"name":"Free5Gc"}},"product_version":"\u003c 4.2.2"}],"enisaIdVendor":[{"id":"c742b0e4-38f3-3d57-b767-c17de578f111","vendor":{"name":"Free5Gc"}}],"enisaIdVulnerability":[{"id":"3274c88f-b264-3113-83b7-0f8eda77df64","vulnerability":{"id":"GHSA-p9mg-74mg-cwwr","description":"free5GC\u0027s SMF UPI DELETE /upi/v1/upNodesLinks/{ref} panics on AN-node deletion via nil UPF dereference; unauthenticated, state-mutating","datePublished":"May 8, 2026, 11:01:56 PM","dateUpdated":"Jun 8, 2026, 11:48:26 PM","baseScore":0.0,"references":"https://github.com/free5gc/free5gc/security/advisories/GHSA-p9mg-74mg-cwwr\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-44328\nhttps://github.com/free5gc/free5gc/issues/905\nhttps://github.com/free5gc/smf/pull/199\nhttps://github.com/free5gc/smf/commit/b57bc48081c3d3a2f333d02eb78e4fd31a120deb\nhttps://github.com/free5gc/free5gc\n","enisa_id":"EUVD-2026-32570\n","aliases":"CVE-2026-44328\nGHSA-p9mg-74mg-cwwr\n","epss":0.0,"dataProcessed":"Nov 1, 2026, 2:00:21 AM","vulnerabilityProduct":[],"vulnerabilityVendor":[]}},{"id":"ce76778b-3b0a-35dd-90a7-96b8722ab9b7","vulnerability":{"id":"CVE-2026-44328","description":"free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC\u0027s 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.","datePublished":"May 27, 2026, 3:39:44 PM","dateUpdated":"May 27, 2026, 5:42:00 PM","status":"PUBLISHED","baseScore":8.2,"baseScoreVersion":"3.1","baseScoreVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","references":"https://github.com/free5gc/free5gc/security/advisories/GHSA-p9mg-74mg-cwwr\nhttps://github.com/free5gc/free5gc/issues/905\nhttps://github.com/free5gc/smf/pull/199\nhttps://github.com/free5gc/smf/commit/b57bc48081c3d3a2f333d02eb78e4fd31a120deb\n","enisa_id":"EUVD-2026-32570\n","assigner":"GitHub_M","epss":0.32,"dataProcessed":"Nov 7, 2026, 7:21:46 AM","vulnerabilityProduct":[{"id":"689a5a4a-cf39-3b79-8615-df91275c242c","product":{"name":"Free5GC","vendor":{"name":"Free5Gc"}},"product_version":"\u003c 4.2.2"}],"vulnerabilityVendor":[{"id":"788a2d2b-7c5b-3a8d-b9f1-a9f8431bb2a4","vendor":{"name":"Free5Gc"}}]}}],"enisaIdAdvisory":[]}