CVE-2026-4531
Free5GC AMF handler.go HandleRegistrationComplete denial of service
- State
- Published
- Severity
- 6.9 Medium
- Published
- Mar 22, 2026
- Updated
- Mar 23, 2026
- Reserved
- Mar 21, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | 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 | VulDB |
| 3.1 | 5.3 Medium | 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 | VulDB |
| 3.0 | 5.3 Medium | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C | VulDB |
| 2.0 | 5.0 Medium | AV:N/AC:L/Au:N/C:N/I:N/A:P/E:ND/RL:OF/RC:C | VulDB |
Weaknesses
- CWE-404 Denial of Service
Affected Products
| Product | Versions |
|---|---|
Free5GCn/a |
|
References
- VDB-352319 | Free5GC AMF handler.go HandleRegistrationComplete denial of servicevdb-entrytechnical-description
- VDB-352319 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
- Submit #774073 | Linux Foundation free5GC 4.1.0 Denial of Servicethird-party-advisory
- https://github.com/free5gc/free5gc/issues/792issue-tracking
- https://github.com/free5gc/amf/pull/198issue-trackingpatch
- https://github.com/free5gc/amf/commit/52e9386401ce56ea773c5aa587d4cdf7d53da799patch
- https://github.com/free5gc/free5gc/product
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