free5GC AUSF authentication contexts can be overwritten by concurrent requests for the same SUPI

Date Aug 28, 2026
Type Vendor advisory
Signal High-risk advisory
Vendor / Product Go ยท github.com/free5gc/ausf
CVE CVE-2026-55784
High-risk advisory CVE-2026-55784

Summary

free5GC AUSF authentication contexts can be overwritten by concurrent requests for the same SUPI

Why it matters

GitHub has published a reviewed security advisory for github.com/free5gc/ausf. Prioritize it with other application dependency updates.

Operator check

Check whether github.com/free5gc/ausf is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available.

Sources

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.