An issue in Free5GC v.4.2.2 allows a remote attacker to cause a denial of service via the UPF component
Priority HIGH 72CWE-476Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-476.
Summary
An issue in Free5GC v.4.2.2 allows a remote attacker to cause a denial of service via the UPF component
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00759 55th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-75439
- 2026-10-03 Alias added: GHSA-5whm-8jh8-99wq
References
Other 5
- https://github.com/free5gc/free5gc/issues/1059
- https://github.com/free5gc/go-upf/pull/97
- https://gist.github.com/hackeryounow/0f434c03008462e6eec3b43ed3cd12d8
- https://github.com/hackeryounow/5GCVulDB/tree/main/CVE-2026-75439
- https://github.com/free5gc/free5gc/issues/1059.https://github.com/free5gc/go-upf/pull/97
Sources
- CVE-2026-75439 · CVE Program
- CVE-2026-75439 · NVD
- FIRST EPSS
- GHSA-5whm-8jh8-99wq · GitHub Advisory Database · CC BY 4.0
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