EUVD-2026-67107
GHSA-x37g-h6m9-3g36
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The NGAP N2 endpoint is network-accessible with no authentication; the sole impact is an AMF process crash with no confidentiality or integrity effects and no scope change.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
4DescriptionCVE.org
A NULL pointer dereference in the AMF NGAP Dispatcher component of free5gc v4.0.1 allows attackers to cause a Denial of Service (DoS) via supplying crafted NGAP messages during the initialization of a new RAN connection.
AnalysisAI
NULL pointer dereference in the AMF NGAP Dispatcher of free5GC v4.0.1 allows an unauthenticated remote attacker to crash the Access and Mobility Management Function by sending crafted NGAP messages during the initialization of a new RAN connection, resulting in complete availability loss for the 5G core control plane. The AMF is a central 5G core component responsible for registration and mobility management for all connected user equipment, so a successful crash severs control-plane service for all gNBs attached to that AMF instance. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network-level reachability to the AMF's N2 interface (the NGAP endpoint, typically operating over SCTP on port 38412), which is by design accessible to gNB nodes. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS vector (AV:N/AC:L/PR:N/UI:N) represents a maximally accessible attack surface - network-reachable, no authentication, low complexity - and the SSVC assessment independently confirms Automatable:yes, indicating the crash can be reliably triggered without manual attacker interaction. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patched version is identified from the available data - the sole primary reference is an open GitHub issue (https://github.com/free5gc/free5gc/issues/768), which should be monitored closely for any upstream commits or tagged releases that address the NULL pointer dereference. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Isolate or restrict network access to free5GC v4.0.1 AMF instances if deployed in production; document all affected deployments and establish incident response contacts. …
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Same weakness CWE-476 – NULL Pointer Dereference
View allSame technique Denial Of Service
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External POC / Exploit Code
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