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CVE-2026-42081

6.1 MEDIUM

free5GC is an open-source implementation of the 5G core network

Published: 2026-05-27 · Last updated: 2026-05-29

Severity and scoring

CVSS
6.1 MEDIUM
Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L
CWE
CWE-358

Affected products

VendorProduct
free5gcfree5gc

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.

Source: NVD

References

Related CVEs

Same vendor

  • CVE-2026-44330 — free5GC is an open-source implementation of the 5G core network (10.0 CRITICAL)
  • CVE-2026-44329 — free5GC is an open-source implementation of the 5G core network (10.0 CRITICAL)
  • CVE-2026-44328 — free5GC is an open-source implementation of the 5G core network (8.2 HIGH)
  • CVE-2026-44327 — free5GC is an open-source implementation of the 5G core network (10.0 CRITICAL)
  • CVE-2026-44326 — free5GC is an open-source implementation of the 5G core network (9.4 CRITICAL)

Same CWE

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  • CVE-2026-44475 — Ella Core is a 5G core designed for private networks (6.1 MEDIUM)
  • CVE-2026-44474 — Ella Core is a 5G core designed for private networks (3.7 LOW)
  • CVE-2026-44473 — Ella Core is a 5G core designed for private networks (7.1 HIGH)