Security Flaw in Free5GC's AMF Component
CVE-2026-42082

3.7LOW

Key Information:

Vendor

Free5gc

Status
Free5gc
Vendor
CVE Published:
27 May 2026

What is CVE-2026-42082?

The AMF (Access and Mobility Function) in Free5GC lacks enforcement of concurrent security procedure rules established in 3GPP TS 33.501 §6.9.5.1, which can lead to inconsistencies between the NAS (Non-Access Stratum) and AS (Access Stratum) security contexts during critical operations. Specifically, the AMF does not verify the status of ongoing N2 handover procedures prior to launching a NAS Security Mode Command, potentially compromising security integrity within the network and affecting user equipment (UE). This issue is rectified in version 4.2.2.

Affected Version(s)

free5gc < 4.2.2

References

https://github.com/free5gc/free5gc/security/advisories/GH...
x_refsource_CONFIRM

CVSS V3.1

Score:
3.7
Severity:
LOW
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Adjacent Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.