CVE-2026-4531 MEDIUM

CVE-2026-4531: Free5GC AMF handler.go HandleRegistrationComplete denial of service

Vendor N/A
Product Free5GC
Weakness CWE-404
Published March 22, 2026
Last update March 23, 2026
View on NVD All CVEs

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 22, 2026 CVE published
March 23, 2026 Record updated