CVE-2026-94043 free5gc CVE debrief

Who should care

Defenders responsible for Free5GC deployments up to 4.2.3 should assess exposure and apply the patch e323b01464355781b8b8d5dd695e05cbc00a62f2. Defenders should prioritize verifying exposure in Free5GC deployments up to 4.2.3 and applying the patch e323b01464355781b8b8d5dd695e05cbc00a62f2. Operators of Free5GC deployments should review the vulnerability and take action to protect their systems.

Why it matters

CVE-2026-94043 allows remote attackers to initiate a race condition in Free5GC up to 4.2.3. Defenders should verify exposure and apply the patch.

• Verify exposure in Free5GC deployments up to 4.2.3
• Apply patch e323b01464355781b8b8d5dd695e05cbc00a62f2
• Monitor for remote attacks on Gmm Handler

Technical summary

The vulnerability affects unknown code of the file /corefuzzer_deps/free5gc/NFs/amf/internal/gmm/handler.go of the component Gmm Handler in Free5GC up to 4.2.3, allowing a remote attacker to initiate a race condition. The attack can be initiated remotely. The patch name is e323b01464355781b8b8d5dd695e05cbc00a62f2. Defenders should prioritize verifying exposure in Free5GC deployments up to 4.2.3 and applying the patch e323b01464355781b8b8d5dd695e05cbc00a62f2. The vulnerability allows remote attackers to initiate a race condition in Free5GC up to 4.2.3, specifically in the Gmm Handler.

Defensive priority

Defenders should prioritize verifying exposure in Free5GC deployments up to 4.2.3 and applying the patch e323b01464355781b8b8d5dd695e05cbc00a62f2.

Recommended defensive actions

• Verify Free5GC deployments up to 4.2.3 for exposure
• Apply patch e323b01464355781b8b8d5dd695e05cbc00a62f2
• Monitor for remote attacks on Gmm Handler
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. The source references provide additional details about the patch and affected code. The vulnerability affects Free5GC up to 4.2.3, and defenders should verify exposure and apply the patch e323b01464355781b8b8d5dd695e05cbc00a62f2. The source references provide additional details about the patch and affected code, but the scope of affected systems and potential impact are not well-defined.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.