CVE-2026-94043: Free5GC Gmm handler.go race condition

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-20 · updated 2026-09-21
Weakness: CWE-362

Description

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.

Affected products

free5gc: 4.2.0, 4.2.1, 4.2.2, 4.2.3

References

https://github.com/free5gc/amf/commit/e323b01464355781b8b8d5dd695e05cbc00a62f2
https://github.com/free5gc/amf/pull/238
https://github.com/free5gc/free5gc/
https://github.com/free5gc/free5gc/issues/1109
https://vuldb.com/cve/CVE-2026-94043
https://vuldb.com/submit/949261
https://vuldb.com/vuln/407972
https://vuldb.com/vuln/407972/cti
https://github.com/free5gc/free5gc/issues/1109
https://vuldb.com/submit/949261

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