CVE-2026-94043 Free5GC Gmm handler.go race condition
A race condition in the Free5GC Gmm handler allows remote attackers to exploit concurrency issues, requiring a patch for mitigation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-94043?
CVE-2026-94043 is a medium-severity vulnerability in Free5GC, published on 20 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-362
Which versions are affected by CVE-2026-94043?
How do I fix CVE-2026-94043?
No fix has been published for CVE-2026-94043 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-94043 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-94043 exists.
Sources
Also known as GHSA-xw42-gh9m-wv36.