{"id":"CVE-2026-44317","aliases":["GHSA-wwqh-7jm5-gj7w","GO-2026-5731"],"url":"https://o3.security/vulnerability/CVE-2026-44317","summary":"free5GC: PCF npcf-policyauthorization POST /app-sessions panics on suppFeat=1 with missing AfRoutReq via nil pointer dereference","details":"free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's PCF POST /npcf-policyauthorization/v1/app-sessions handler panics on a single authenticated request whose ascReqData.suppFeat == \"1\" (enabling traffic-routing feature negotiation) and whose medComponents entries supply an afAppId but NO AfRoutReq. The create path then calls provisioningOfTrafficRoutingInfo(smPolicy, appID, routeReq, ...) with routeReq == nil and dereferences routeReq.RouteToLocs (and other fields) without a nil check, causing runtime error: invalid memory address or nil pointer dereference. Gin recovery converts the panic into HTTP 500. This vulnerability is fixed in 4.2.2.","published":"2026-05-27T15:50:18.242Z","modified":"2026-08-07T11:51:08.207776080Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/free5gc/pcf","fixedVersion":"1.4.3"}],"fix":{"url":"https://github.com/free5gc/pcf/commit/508d70b8527a6c8c923179dad450ea01e16b6aeb","label":"free5gc/pcf@508d70b"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44317.json"},{"type":"ADVISORY","url":"https://github.com/free5gc/free5gc/security/advisories/GHSA-wwqh-7jm5-gj7w"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44317"},{"type":"REPORT","url":"https://github.com/free5gc/free5gc/issues/879"},{"type":"FIX","url":"https://github.com/free5gc/pcf/commit/508d70b8527a6c8c923179dad450ea01e16b6aeb"},{"type":"FIX","url":"https://github.com/free5gc/pcf/pull/65"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:51:08.207776080Z"}}