CVE-2026-42082
Last modified
CVE-2026-42082 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, the AMF in Free5GC does not enforce the concurrent security procedure rules defined in 3GPP TS 33.501 §6.9.5.1. EPSS estimates a 0.25% chance of exploitation in the next 30 days.
Description
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, the AMF in Free5GC does not enforce the concurrent security procedure rules defined in 3GPP TS 33.501 §6.9.5.1. The AMF does not check for ongoing N2 handover procedures before initiating a NAS Security Mode Command, and vice versa. This can lead to mismatches between NAS and AS security contexts in the network and the UE. This vulnerability is fixed in 4.2.2.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Free5gc | Free5gc | < 4.2.2 |
References
- https://github.com/free5gc/free5gc/security/advisories/GHSA-vrrx-58h3-prmhExploit, Vendor Advisory
- https://github.com/free5gc/free5gc/security/advisories/GHSA-vrrx-58h3-prmhExploit, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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