CVE-2025-69247
free5GC has Heap Buffer Overflow in UPF Leading to Denial of Service
Description
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.
INFO
Published Date :
Feb. 23, 2026, 10:16 p.m.
Last Modified :
Feb. 25, 2026, 4:21 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | LOW | [email protected] |
Solution
- Update free5GC go-upf to version 1.2.8.
- Apply vendor patches if available.
- Monitor UPF for stability after update.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-69247.
| URL | Resource |
|---|---|
| https://github.com/free5gc/free5gc/issues/746 | Exploit Issue Tracking Patch Vendor Advisory |
| https://github.com/free5gc/free5gc/security/advisories/GHSA-gf69-93xr-p23g | Patch Vendor Advisory |
| https://github.com/free5gc/go-upf/commit/b798fe5ee6a984be492fa53958dd5f1305469f85 | Patch |
| https://github.com/free5gc/go-upf/pull/85 | Issue Tracking Patch |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-69247 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-69247
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-69247 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-69247 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Feb. 25, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CPE Configuration OR *cpe:2.3:a:free5gc:go-upf:*:*:*:*:*:go:*:* versions up to (excluding) 1.2.8 Added Reference Type GitHub, Inc.: https://github.com/free5gc/free5gc/issues/746 Types: Exploit, Issue Tracking, Patch, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/free5gc/free5gc/security/advisories/GHSA-gf69-93xr-p23g Types: Patch, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/free5gc/go-upf/commit/b798fe5ee6a984be492fa53958dd5f1305469f85 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/free5gc/go-upf/pull/85 Types: Issue Tracking, Patch -
New CVE Received by [email protected]
Feb. 23, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-122 Added Reference https://github.com/free5gc/free5gc/issues/746 Added Reference https://github.com/free5gc/free5gc/security/advisories/GHSA-gf69-93xr-p23g Added Reference https://github.com/free5gc/go-upf/commit/b798fe5ee6a984be492fa53958dd5f1305469f85 Added Reference https://github.com/free5gc/go-upf/pull/85