CVE-2026-4531

Free5GC AMF handler.go HandleRegistrationComplete denial of service

MEDIUM
5.3
CVSS Score
Published: March 22, 2026 at 01:32 AM UTC
Updated: June 17, 2026 at 10:56 AM UTC
1 product affected across 1 vendorFREE5GC

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.4%
SSVC
PoC

Description

A weakness has been identified in Free5GC 4.1.0. Affected is the function HandleRegistrationComplete of the file internal/gmm/handler.go of the component AMF. Executing a manipulation can lead to denial of service. The attack may be performed from remote. This patch is called 52e9386401ce56ea773c5aa587d4cdf7d53da799. It is best practice to apply a patch to resolve this issue.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (7)

VDB EntryTechnical Description
Source: cverecord
https://vuldb.com/?id.352319
SignaturePermissions Required
Source: cverecord
https://vuldb.com/?ctiid.352319
Third Party Advisory
Source: cverecord
https://vuldb.com/?submit.774073
Issue Tracking
Source: cverecord
https://github.com/free5gc/free5gc/issues/792
Issue TrackingPatch
Source: cverecord
https://github.com/free5gc/amf/pull/198
Product
Source: cverecord
https://github.com/free5gc/free5gc/

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-404

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