CVE-2026-4531— Free5GC AMF handler.go HandleRegistrationComplete denial of service
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I. Basic Information for CVE-2026-4531
Vulnerability Information
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Vulnerability Title
Free5GC AMF handler.go HandleRegistrationComplete denial of service
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
不恰当的资源关闭或释放
Source: NVD (National Vulnerability Database)
Vulnerability Title
free5GC 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
free5GC是free5GC开源的一个第 5 代 (5G) 移动核心网络的开源项目。 Free5GC 4.1.0版本存在安全漏洞，该漏洞源于AMF组件文件internal/gmm/handler.go中函数HandleRegistrationComplete存在错误，可能导致拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| - | Free5GC | 4.1.0 | cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:* |
II. Public POCs for CVE-2026-4531
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|---|
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- Submit #774073: Linux Foundation free5GC 4.1.0 Denial of Servicethird-party-advisory
- CVE-2026-4531 Free5GC AMF handler.go HandleRegistrationComplete denial of service (Issue 792)vdb-entrytechnical-description
- https://nvd.nist.gov/vuln/detail/CVE-2026-4531
Same Patch Batch · n/a · 2026-03-22 · 7 CVEs total
| CVE-2026-4562 | 7.3 HIGH | MacCMS Timming API Endpoint Timming.php weak authentication |
| CVE-2026-4542 | 5.4 MEDIUM | SSCMS layerImage Endpoint LayerImageController.Submit.cs path traversal |
| CVE-2026-4538 | 5.3 MEDIUM | PyTorch pt2 Loading deserialization |
| CVE-2026-4563 | 4.3 MEDIUM | MacCMS Member Order Detail User.php order_info authorization |
| CVE-2026-4115 | 3.7 LOW | PuTTY Ed25519 Signature ecc-ssh.c eddsa_verify signature verification |
| CVE-2026-4539 | 3.3 LOW | pygments archetype.py AdlLexer redos |
IV. Related Vulnerabilities
Same product: Free5GC
- CVE-2026-40249
free5gc UDR fail-open request handling in PolicyDataSubsToNo - CVE-2026-40248
free5gc UDR improper path validation allows unauthenticated - CVE-2026-40247
free5gc UDR improper path validation allows unauthenticated - CVE-2026-40246
free5gc UDR improper path validation allows unauthenticated - CVE-2026-40245
Free5GC: UDR nudr-dr influenceData/subs-to-notify leaks SUPI
Same vendor: n/a
- CVE-2026-8276
bettercap MySQL Server mysql_server.go integer coercion - CVE-2026-8275
bettercap zerogod IPP Service zerogod_ipp_primitives.go ippR - CVE-2026-8270
Open5GS SMF ogs_nas_parse_qos_rules denial of service - CVE-2026-8269
Open5GS SMF smf_nsmf_handle_create_sm_context denial of serv - CVE-2026-8268
Open5GS SMF OpenAPI_list_create denial of service
Same weakness: CWE-404
- CVE-2026-8270
Open5GS SMF ogs_nas_parse_qos_rules denial of service - CVE-2026-8269
Open5GS SMF smf_nsmf_handle_create_sm_context denial of serv - CVE-2026-8268
Open5GS SMF OpenAPI_list_create denial of service - CVE-2026-8267
Open5GS SMF smf_nsmf_handle_created_data_in_vsmf denial of s - CVE-2026-8266
Open5GS SMF gsm-build.c gsm_build_pdu_session_establishment_
V. Comments for CVE-2026-4531
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