CVE-2026-4531

MEDIUM

Free5GC AMF handler.go HandleRegistrationComplete denial of service

Title source: cna
STIX 2.1

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.

References (7)

Core 7
Core References
Vdb Entry, Technical Description vdb-entry technical-description
VDB-352319 | Free5GC AMF handler.go HandleRegistrationComplete denial of service
https://vuldb.com/?id.352319
Signature, Permissions Required signature permissions-required
VDB-352319 | CTI Indicators (IOB, IOC, TTP, IOA)
https://vuldb.com/?ctiid.352319
Third Party Advisory third-party-advisory
Submit #774073 | Linux Foundation free5GC 4.1.0 Denial of Service
https://vuldb.com/?submit.774073
Issue Tracking issue-tracking
https://github.com/free5gc/free5gc/issues/792
Patch issue-tracking patch
https://github.com/free5gc/amf/pull/198

Scores

CVSS v3 5.3
EPSS 0.0043
EPSS Percentile 33.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-404
Status published
Products (2)
free5gc/amf 0 - 1.4.3-0.20260306074636-52e9386401ceGo
n/a/Free5GC 4.1.0
Published Mar 22, 2026
Tracked Since Mar 22, 2026