CVE-2026-42081
Medium · 6.1CVSS
6.1
EPSS
0.3%
Published
May 27, 2026
CISA due date
—
The record
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 packages
| Ecosystem | Package | Introduced | Fixed |
|---|
Related vulnerabilities
- CVE-2026-46582 In NLnet Labs Unbound 1.6.0 up to and including 1.25.1, a replay of a wildcard rrset as… CWE-358
- CVE-2026-49783 Improperly implemented security check for standard in Windows Secure Boot allows an… CWE-358
- CVE-2026-11122 Inappropriate implementation in Keyboard in Google Chrome prior to 149.0.7827.53 allowed… CWE-358
- CVE-2026-11127 Inappropriate implementation in WebAPKs in Google Chrome on Android prior to… CWE-358
- CVE-2026-44475 Ella Core is a 5G core designed for private networks. CWE-358
- CVE-2026-44473 Ella Core is a 5G core designed for private networks. CWE-358
- CVE-2026-44474 Ella Core is a 5G core designed for private networks. CWE-358
- CVE-2026-42082 free5GC is an open-source implementation of the 5G core network. CWE-358