TI-2026-63280 Aliases CVE-2026-94043 GHSA-xw42-gh9m-wv36

Free5GC Gmm handler.go race condition

HIGH 70CWE-362Published 2026-09-20 · Updated 2026-09-21

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: None · None · Low
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

A vulnerability was determined in Free5GC up to 4.2.3. This vulnerability affects unknown code of the file /corefuzzer_deps/free5gc/NFs/amf/internal/gmm/handler.go of the component Gmm Handler. This manipulation causes race condition. The attack can be initiated remotely. Patch name: e323b01464355781b8b8d5dd695e05cbc00a62f2. To fix this issue, it is recommended to deploy a patch.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00572 47th 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
—	Free5GC	4.2.0; 4.2.1; 4.2.2; 4.2.3	—	No fix listed	CNA

Free5GC Vendor— Affected 4.2.0; 4.2.1; 4.2.2; 4.2.3 Fixed in — No fix listed CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:free5gc:free5gc::::::::	—	—	free5gc

cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:* Versions — — ·free5gc

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-94043
2026-10-03 Alias added: GHSA-xw42-gh9m-wv36

References

Patch 2

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences