CVE-2026-55784 free5GC AUSF authentication contexts can be overwritten by concurrent requests for the same SUPI

free5GC is an open-source implementation of the 5G core network. In version 1.4.4 and earlier, the AUSF component stores per-subscriber authentication state in a global sync.Map named AUSFContext.UePool in internal/context/context.go, keyed only by SUPI. Every request handled by...

CVE-2026-55784

free5GC is an open-source implementation of the 5G core network. In version 1.4.4 and earlier, the AUSF component stores per-subscriber authentication state in a global sync.Map named AUSFContext.UePool in internal/context/context.go, keyed only by SUPI. Every request handled by...

CVE-2026-55784

free5GC is an open-source 5G core network implementation. In versions 1.4.4 and earlier , the AUSF component stores per-subscriber authentication state in a global sync.Map keyed only by SUPI . Because each request unconditionally replaces the active context for that SUPI, an attacker with access...

CVE-2026-55785: Observable Timing Discrepancy

free5GC is an open-source implementation of the 5G core network. Prior to 1.4.5, the AUSF component performs cryptographic authentication comparisons in internal/sbi/processor/ueauthentication.go with ordinary equality helpers. Auth5gAkaComfirmRequestProcedure compares RES and XRES with...

PT-2026-83369

Name of the Vulnerable Software and Affected Versions free5GC versions 1.4.4 and earlier Description The AUSF component stores per-subscriber authentication state in a global sync.Map named AUSFContext.UePool within internal/context/context.go, using only the SUPI as a key. Requests processed by...

PT-2026-83370

Name of the Vulnerable Software and Affected Versions free5GC versions prior to 1.4.5 Description The AUSF component uses non-constant-time equality helpers for cryptographic authentication comparisons in internal/sbi/processor/ue authentication.go. Specifically, the...

CVE-2026-55784: Concurrent Execution using Shared Resource with Improper Synchronization

free5GC is an open-source implementation of the 5G core network. In version 1.4.4 and earlier, the AUSF component stores per-subscriber authentication state in a global sync.Map named AUSFContext.UePool in internal/context/context.go, keyed only by SUPI. Every request handled by...

GO-2026-6161 free5GC AUSF: null byte injection in supiOrSuci causes HTTP 500 internal service failure in github.com/free5gc/ausf

free5GC AUSF: null byte injection in supiOrSuci causes HTTP 500 internal service failure in github.com/free5gc/ausf...

PT-2026-80402

free5GC AUSF: null byte injection in supiOrSuci causes HTTP 500 internal service failure in github.com/free5gc/ausf...

CVE-2026-53551

free5GC is an open-source implementation of the 5G core network. Prior to 1.4.5, the free5GC AUSF Authentication Server Function does not validate the supiOrSuci field in UE authentication requests. Null bytes \x00 and other control characters pass through JSON parsing unchanged and are forwarded...

CVE-2026-53551

free5GC is an open-source implementation of the 5G core network. Prior to 1.4.5, the free5GC AUSF Authentication Server Function does not validate the supiOrSuci field in UE authentication requests. Null bytes \x00 and other control characters pass through JSON parsing unchanged and are forwarded...

CVE-2026-53551: Improper Input Validation

free5GC is an open-source implementation of the 5G core network. Prior to 1.4.5, the free5GC AUSF Authentication Server Function does not validate the supiOrSuci field in UE authentication requests. Null bytes \x00 and other control characters pass through JSON parsing unchanged and are forwarded...

CVE-2026-8745

A vulnerability was identified in Open5GS up to 2.7.7. Affected by this vulnerability is the function ogstimeradd in the library /src/ausf/nausf-handler.c of the component AUSF. The manipulation leads to denial of service. The attack can be initiated remotely. The exploit is publicly available an...

CVE-2026-8745

A vulnerability was identified in Open5GS up to 2.7.7. Affected by this vulnerability is the function ogstimeradd in the library /src/ausf/nausf-handler.c of the component AUSF. The manipulation leads to denial of service. The attack can be initiated remotely. The exploit is publicly available an...

CVE-2026-8745: Improper Resource Shutdown or Release

A vulnerability was identified in Open5GS up to 2.7.7. Affected by this vulnerability is the function ogstimeradd in the library /src/ausf/nausf-handler.c of the component AUSF. The manipulation leads to denial of service. The attack can be initiated remotely. The exploit is publicly available an...

Open5GS security vulnerabilities

Open5GS is an open-source implementation of 5G Core and EPC in C language, which serves as the core network for LTE/NR networks. Versions of Open5GS 2.7.7 and earlier contain security vulnerabilities. These vulnerabilities stem from the ogstimeradd function in the nausf-handler.c file within the...

PT-2026-41537

A vulnerability was identified in Open5GS up to 2.7.7. Affected by this vulnerability is the function ogs timer add in the library /src/ausf/nausf-handler.c of the component AUSF. The manipulation leads to denial of service. The attack can be initiated remotely. The exploit is publicly available...

EUVD-2026-20509

OpenAirInterface Version 2.2.0 has a Buffer Overflow vulnerability in processing UplinkNASTransport containing Authentication Response containing a NAS PDU with oversize response For example 100 byte. The response is decoded by AMF and passed to the AUSF component for verification. AUSF crashes o...

CVE-2026-30075

OpenAirInterface Version 2.2.0 has a Buffer Overflow vulnerability in processing UplinkNASTransport containing Authentication Response containing a NAS PDU with oversize response For example 100 byte. The response is decoded by AMF and passed to the AUSF component for verification. AUSF crashes o...

CVE-2026-33063

CVE-2026-33063 affects free5GC AUSF prior to 1.4.2. The vulnerability is an improper nil check in GetSupiFromSuciSupiMap, which can panic when SuciSupiMap is nil, causing the AUSF authentication service to crash and deny service for deployments using the UE authentication endpoint /nausf-auth/v1/...