Buffer overflow in Free5gc Go-Upf
CVE-2025-69247
free5GC go-upf is the User Plane Function (UPF) implementation for 5G networks that is part of the free5GC project. Versions prior to 1.2.8 have a Heap-based Buffer Overflow (CWE-122) vulnerability leading to Denial of Service. Remote attackers can crash the UPF network element by sending a specially crafted PFCP Session Modification Request with an invalid SDF Filter length field. This causes a heap buffer overflow, resulting in complete service disruption for all connected UEs and potential cascading failures affecting the SMF. All deployments of free5GC using the UPF component may be affected. Version 1.2.8 of go-upf contains a fix.
Vulnerability class: Buffer Overflow
EPSS: 0.005 (41.6th percentile) — read the EPSS interpretation.
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.
Affected products
- Free5gc Go-upf — versions < 1.2.8
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
- security-advisories@github.com (Exploit, Patch, x_refsource_MISC, Issue Tracking, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-69247?
- CVE-2025-69247 is a high-severity vulnerability in Free5gc Go-Upf, classified under Heap-based Buffer Overflow. CVSS score: 7.5/10. Published 2026-02-23.
- How severe is CVE-2025-69247?
- High severity. CVSS v3 base score is 7.5 out of 10.