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    CVE-2026-42082

    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.

    Published:May 27, 2026
    Last Modified:May 28, 2026
    EPS:May 27, 2026
    EPSS Score:0.00015
    CVSS Score:3.7

    Affected Products

    Vendor
    Free5gc
    Product
    Free5gc

    Exploits

    https://github.com/free5gc/free5gc/security/advisories/GHSA-vrrx-58h3-prmhhttps://github.com/free5gc/free5gc/security/advisories/GHSA-vrrx-58h3-prmh

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-55785 (CVSS 3.7) — free5GC is an open-source implementation of the 5G core network. Prior to 1.4.5, the AUSF component performs c…
    CVE-2026-55784 (CVSS 7.5) — free5GC is an open-source implementation of the 5G core network. In version 1.4.4 and earlier, the AUSF compon…
    CVE-2026-55068 (CVSS 9.3) — free5GC is an open-source implementation of the 5G core network. In 4.2.2 and earlier, the NRF RegisterNFInsta…
    CVE-2026-30069 (CVSS 7.5) — A NULL pointer dereference in the UDMC registration handler component of free5gc v4.0.1 allows attackers to ca…
    CVE-2026-30070 (CVSS 7.5) — An issue in the HandleGetSharedData function of free5gc v4.0.1 allows attackers to cause a Denial of Service (…
    CVE-2026-30050 (CVSS 7.5) — An issue in the ModifyAMFEventSubscriptionProcedure function (processor/event_exposure.go) of free5gc v4.1.0 a…
    CVE-2026-30051 (CVSS 7.5) — An issue in the CreateUEContextProcedure function (/v1/ue-contexts/{supi}) of free5gc v4.1.0 allows attackers …
    CVE-2026-30056 (CVSS 7.5) — A NULL pointer dereference in the AMF NGAP Dispatcher component of free5gc v4.0.1 allows attackers to cause a …
    CVE-2026-30067 (CVSS 7.5) — An issue in the complexQueryFilterSubprocess function in the NRF Discovery service of free5gc v4.0.1 allows at…
    CVE-2026-30062 (CVSS 7.5) — An issue in the NGAP handler of free5gc v4.0.1 allows attackers to cause a Denial of Service (DoS) via a craft…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High