CVE-2025-69247 free5GC has Heap Buffer Overflow in UPF Leading to Denial of Service
Remote attackers can crash the free5GC UPF component via crafted PFCP requests, causing service disruption for connected users.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-69247?
CVE-2025-69247 is a low-severity memory corruption vulnerability in free5gc go-upf, published on 23 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-122
Which versions are affected by CVE-2025-69247?
It affects 1 product.
Products include Free5gc Go-Upf.
How do I fix CVE-2025-69247?
No fix has been published for CVE-2025-69247 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-69247 being exploited?
There is no known exploitation of CVE-2025-69247 in the wild and no public exploit code.
Other vulnerabilities in free5gc go-upf
Sources
Also known as GHSA-gf69-93xr-p23g.