Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable via NGAP with low-privilege N2 access required (PR:L); only partial local availability impact; no confidentiality or integrity effect.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
Lifecycle Timeline
3DescriptionCVE.org
A vulnerability was identified in omec-project amf up to 2.0.2/2.1.1. Impacted is an unknown function of the file /go/src/amf/ngap/handler.go of the component NGSetupRequest Handler. The manipulation leads to denial of service. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The identifier of the patch is 34bc6724acc97dba1f8691e586da95b042cb612d. To fix this issue, it is recommended to deploy a patch.
AnalysisAI
Denial of service in omec-project's 5G Access and Mobility Management Function (AMF) versions up to 2.0.2 and 2.1.1 allows remote low-privileged attackers to crash the AMF process by sending a malformed NGSetupRequest message over the NGAP interface. A publicly available proof-of-concept exploit exists via GitHub issue #677, lowering the exploitation barrier substantially. No CISA KEV listing exists, but given the AMF's role as the central mobility and registration anchor in 5G core infrastructure, even a partial service disruption can deny connectivity across entire served cell areas.
Technical ContextAI
The omec-project AMF is an open-source Go implementation of the 3GPP-defined 5G Core Access and Mobility Management Function, used in cloud-native and research 5G deployments. The vulnerable code resides in /go/src/amf/ngap/handler.go, specifically in the handler for NGSetupRequest messages - the initial NGAP (NG Application Protocol) handshake sent by 5G gNodeBs (base stations) over the N2 interface to establish control-plane connectivity with the AMF. CWE-404 (Improper Resource Shutdown or Release) identifies the root cause class: the handler fails to properly close, release, or deallocate resources when processing unexpected or malformed NGSetupRequest payloads, leading to a crash or resource exhaustion. The CPE cpe:2.3:a:omec-project:amf:*:*:*:*:*:*:*:* covers all versions of this component. In 5G networks, the N2 interface carrying NGAP is typically SCTP-based and isolated on a dedicated RAN-facing network segment, but cloud-native deployments may have weaker segmentation.
RemediationAI
Apply the upstream fix available as commit 34bc6724acc97dba1f8691e586da95b042cb612d, introduced via GitHub pull request #666 at https://github.com/omec-project/amf/pull/666. A specific tagged release version confirmed to incorporate this fix was not identified in available data - operators should verify the commit is present in their deployed build by checking the repository's release history or commit log. As a compensating control pending patch application, restrict access to the AMF's N2/NGAP interface (typically SCTP port 38412) via firewall ACLs or network policy to known, authorized gNodeB IP addresses only; this limits the attacker pool to trusted RAN infrastructure and substantially reduces exploitation risk without impacting legitimate traffic. In Kubernetes-based 5G core deployments, enforce NetworkPolicy to permit NGAP traffic only from gNodeB-namespace pods.
free5GC is an open-source project for 5th generation (5G) mobile core networks. Versions up to and including 1.4.1 of fr
Denial of service in omec-project AMF (Access and Mobility Management Function) versions up to 2.1.1 allows a low-privil
Null pointer dereference in OMEC Project AMF (Access and Mobility Management Function) versions up to 2.1.3-dev allows a
Remote denial of service in omec-project AMF versions up to 2.1.3-dev allows authenticated attackers to crash the Access
Null pointer dereference in OMEC Project AMF versions up to 2.1.3-dev allows remote authenticated attackers to trigger d
Memory corruption in OMEC Project AMF (Access and Mobility Management Function) versions up to 2.1.1 allows authenticate
Memory corruption in the omec-project AMF (Access and Mobility Management Function) NGSetupRequest Handler allows networ
Memory corruption in omec-project AMF versions up to 2.1.1 exposes 5G core network infrastructure to remote exploitation
Memory corruption in omec-project AMF (Access and Mobility Management Function) through version 2.1.1 allows authenticat
Memory corruption in omec-project AMF versions up to 2.1.3-dev allows authenticated remote attackers to trigger low-seve
Memory corruption in OMEC Project's Access and Mobility Management Function (AMF) allows authenticated remote attackers
Memory corruption in OMEC Project AMF up to version 2.1.1 occurs in the NGAP Message Handler when processing malformed m
Same weakness CWE-404 – Improper Resource Shutdown or Release
View allSame technique Denial Of Service
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-41663
GHSA-rq3q-xf6q-wrpm