CVE-2026-42082CWE-358

CVE-2026-42082

Low · published May 27, 2026

CVSS v3.1
3.7
EPSS
0%
Percentile
15.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
3.7 · LOW
Vector
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00251 · 15.5th percentile
Weakness
CWE-358 · Improperly Implemented Security Check for Standard
Published
2026-05-27T21:16Z
Affected products (1)
ProductVersionsFixed in
free5gc/free5gc< 4.2.24.2.2
References (2)
https://github.com/free5gc/free5gc/security/advisories/GHSA-vrrx-58h3-prmh · [email protected]https://github.com/free5gc/free5gc/security/advisories/GHSA-vrrx-58h3-prmh · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 27 MAY 15:59Z
    free5GC: Missing Concurrent NAS SMC Validation During NGAP Handover
    cvelistv5