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Vulnerability record · CVE-2025-63679 · published 12 November 2025

CVE-2025-63679: Free5gc classic buffer overflow vulnerability

Free5gc · Free5gc

free5gc v4.1.0 and before is vulnerable to Buffer Overflow. When AMF receives an UplinkRANConfigurationTransfer NGAP message from a gNB, the AMF process crashes.

7.5 CVSS 3.1 High EPSS 0.40% · top 68.5% CWE-120 · Classic buffer overflow
7.5CVSS 3.1 base score
0.40%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

free5gc v4.1.0 and before is vulnerable to Buffer Overflow. When AMF receives an UplinkRANConfigurationTransfer NGAP message from a gNB, the AMF process crashes.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://gist.github.com/DDGod2025/5483d94b028d7a0c111ca23844e8a94d ExploitThird Party Advisory
https://github.com/free5gc/free5gc/issues/725 ExploitIssue Tracking

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2026-44327Free5gc missing authentication for critical function vulnerabilityfree5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF mounts the nnef-oam route group without inbound OAuth2…EPSS 0.53%10.0CVE-2026-44329Free5gc missing authentication for critical function vulnerabilityfree5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's SMF mounts the UPI management route group without OAuth2/b…EPSS 0.56%10.0CVE-2026-44330Free5gc incorrect authorization vulnerabilityfree5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF mounts the nnef-pfdmanagement route group without inbo…EPSS 0.43%9.8CVE-2023-4659Free5gc cross-site request forgery vulnerabilityCross-Site Request Forgery vulnerability, whose exploitation could allow an attacker to perform different actions on the platform as an administrator…EPSS 0.43%9.4CVE-2026-44326Free5gc missing authorization vulnerabilityfree5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF mounts the 3gpp-traffic-influence API without inbound …EPSS 0.53%9.4CVE-2026-44315Free5gc missing authorization vulnerabilityfree5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF mounts the 3gpp-pfd-management API without inbound OAu…EPSS 0.53%8.7CVE-2026-40246Free5gc improper authorization vulnerabilityfree5GC is an open-source implementation of the 5G core network. In versions 1.4.2 and below of the UDR service, the handler for deleting Traffic Inf…EPSS 0.45%8.7CVE-2026-40247Free5gc improper authorization vulnerabilityfree5GC is an open-source implementation of the 5G core network. In versions 4.2.1 and below of the UDR service, the handler for reading Traffic Infl…EPSS 0.51%

Source: NIST National Vulnerability Database (record CVE-2025-63679), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.