CVEvulnerability

CVE-2026-42081

7.1 HIGH Published 2026-05-27 Modified 2026-10-14 Official page ↗
Status
Analyzed
Published
2026-05-27
Last modified
2026-10-14
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.1 MEDIUM — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L
CVSS 3.1 ([email protected])
7.1 HIGH — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Weaknesses
CWE-358

Description

free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, the AMF in Free5GC does not verify the UE Security Capabilities received in NGAP PathSwitchRequest messages against its locally stored values, as mandated by 3GPP TS 33.501 §6.7.3.1. A malicious gNB can overwrite the AMF's stored UE security capabilities with arbitrary values, which are then propagated in PathSwitchRequest Acknowledge messages and subsequent Handover Request messages. This leads to persistent handover denial-of-service for affected UEs. This vulnerability is fixed in 4.2.2.

Affected configurations

• free5gc free5gc (< 4.2.2)

Related

Weakness · CWE (1)

  • CWE-358 Improperly Implemented Security Check for Standard weakness

References