Vulnerability in Free5gc
CVE-2026-4531
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 perfor…
EPSS: 0.001 (24.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C.
Affected products
- N/a Free5gc — versions 4.1.0
Weakness classification (CWE)
References
- VDB-352319 | Free5GC AMF handler.go HandleRegistrationComplete denial of service (vdb-entry, technical-description)
- VDB-352319 | CTI Indicators (IOB, IOC, TTP, IOA) (signature, permissions-required)
- Submit #774073 | Linux Foundation free5GC 4.1.0 Denial of Service (third-party-advisory)
- github.com/free5gc/free5gc/issues/792 (issue-tracking)
- github.com/free5gc/amf/pull/198 (issue-tracking, patch)
- github.com/free5gc/amf/commit/52e9386401ce56ea773c5aa587d4cdf7d53da799 (patch)
- github.com/free5gc/free5gc/ (product)
Frequently asked questions
- What is CVE-2026-4531?
- CVE-2026-4531 is a medium-severity vulnerability in Free5gc, classified under Improper Resource Shutdown or Release. CVSS score: 5.3/10. Published 2026-03-22.
- How severe is CVE-2026-4531?
- Medium severity. CVSS v3 base score is 5.3 out of 10.