# CVE-2026-94043 — Free5GC

> As of 2026-09-21, CVE-2026-94043 is a MEDIUM-severity vulnerability in Free5GC, CVSS v3.1 5.3, EPSS 0.3% (27.6th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-94043 as of 2026-09-21; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-09-21

## What is CVE-2026-94043?

A vulnerability was determined in Free5GC up to 4.2.3. This vulnerability affects unknown code of the file /corefuzzer_deps/free5gc/NFs/amf/internal/gmm/handler.go of the component Gmm Handler. This manipulation causes race condition. The attack can be initiated remotely. Patch name: e323b01464355781b8b8d5dd695e05cbc00a62f2. To fix this issue, it is recommended to deploy a patch.

The record classifies CVE-2026-94043 under weakness class [CWE-362](https://intel.threadlinqs.com/cwe/CWE-362). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 15 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 5.3 — MEDIUM (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C`)
- **CVSS v4.0 base score:** 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P`)
- **EPSS (FIRST):** 0.3% probability of exploitation in the next 30 days, higher than 27.6% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 3.8/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-20, last modified 2026-09-21

## Is CVE-2026-94043 being exploited?

It currently carries a trending score of 36 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **(vendor unspecified)**: Free5GC

## How to fix CVE-2026-94043

No vendor patch reference has been recorded for CVE-2026-94043 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-94043

No threat campaign in the Threadlinqs corpus currently references CVE-2026-94043, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on 2026-09-22.

**Vendor advisory and patch**

- [github.com — issue tracking](https://github.com/free5gc/amf/pull/238)
- [github.com — patch](https://github.com/free5gc/amf/commit/e323b01464355781b8b8d5dd695e05cbc00a62f2)

**Third-party advisory**

- [vuldb.com — signature](https://vuldb.com/vuln/407972/cti)
- [vuldb.com — third party advisory](https://vuldb.com/cve/CVE-2026-94043)
- [vuldb.com — third party advisory (949261)](https://vuldb.com/submit/949261)

**Vulnerability database entry**

- [vuldb.com — vdb entry](https://vuldb.com/vuln/407972)

**Issue tracking and product pages**

- [github.com — issue tracking](https://github.com/free5gc/free5gc/issues/1109)
- [github.com — product](https://github.com/free5gc/free5gc/)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-94043
Full detection coverage and IOCs for threats exploiting CVE-2026-94043 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp