CVE-2026-42082

Free5GC AMF prior to v4.2.2 is vulnerable to missing concurrent NAS SMC validation during NGAP handover. The vulnerability arises because the AMF does not enforce the cross-procedure rules in 3GPP TS 33.501 §6.9.5.1, allowing a NAS Security Mode Command (SMC) to be issued while an N2 handover pro...

CVE-2026-42082 free5GC: Missing Concurrent NAS SMC Validation During NGAP Handover

free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, the AMF in Free5GC does not enforce the concurrent security procedure rules defined in 3GPP TS 33.501 §6.9.5.1. The AMF does not check for ongoing N2 handover procedures before initiating a NAS Security Mode Command,...