Vulnerability in Free5gc Amf
CVE-2025-69248
free5GC is an open-source project for 5th generation (5G) mobile core networks. Versions up to and including 1.4.1 of free5GC's AMF service have a Buffer Overflow vulnerability leading to Denial of Service. Remote unauthenticated attackers can crash the AMF service by sending a specially crafted NAS Registration Request with a malformed 5GS Mobile Identity, causing complete denial of service for the 5G core network. All deployments of free5GC using the AMF component may be affected. Pull request 43 of the free5gc/nas repo contains a fix. No direct workaround is available at the application level. Applying the official patch is recommended.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (47.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000
Affected products
- Free5gc Amf — versions <= 1.4.1
Weakness classification (CWE)
References
- github.com/free5gc/free5gc/security/advisories/GHSA-h6xc-8vvf-jcjp (Patch, Vendor Advisory)
- github.com/free5gc/free5gc/issues/747 (Exploit, Patch, Issue Tracking, Vendor Advisory)
- github.com/free5gc/nas/pull/43 (Patch, Issue Tracking)
- github.com/free5gc/nas/commit/0329a7ac3f314f210366c1b3c33dc29eded4ac5f (Patch)
Frequently asked questions
- What is CVE-2025-69248?
- CVE-2025-69248 is a high-severity vulnerability in Free5gc Amf, classified under Improper Validation of Array Index. CVSS score: 7.5/10. Published 2026-02-23.
- How severe is CVE-2025-69248?
- High severity. CVSS v3 base score is 7.5 out of 10.