Low 2.7Published Feb 23, 2026

CVE-2025-69247free5GC has Heap Buffer Overflow in UPF Leading to Denial of Service

Updated under an hour ago (Oct 26, 2026, 7:10 PM ET)

Does this affect you?

It affects free5gc go-upf and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for free5gc go-upf

Exploited in the last 30 days

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.

CVSS: 2.7 LOW (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
Weakness (CWE): CWE-122
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Feb 25, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

free5gc go-upf free5gc:go_upf (from the name)	before 1.2.8	CNA record
free5gc go-upf free5gc:go-upf	before 1.2.8	NVD

References

References

https://github.com/free5gc/free5gc/security/advisories/GHSA-gf69-93xr-p23g	x-refsource-confirm, patch, vendor-advisory
https://github.com/free5gc/free5gc/issues/746	x-refsource-misc, exploit, issue-tracking, patch, vendor-advisory
https://github.com/free5gc/go-upf/pull/85	x-refsource-misc, issue-tracking, patch
https://github.com/free5gc/go-upf/commit/b798fe5ee6a984be492fa53958dd5f1305469f85	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.