CVE-2025-70121 Denial of service in n/a

What is CVE-2025-70121?

CVE-2025-70121 is a high-severity denial of service vulnerability in Free5gc Free5gc, published on 13 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An array index out of bounds vulnerability in the AMF component of free5GC v4.0.1 allows remote attackers to cause a denial of service via a crafted 5GS Mobile Identity in a NAS Registration Request message. The issue occurs in the GetSUCI method (NAS_MobileIdentity5GS.go) when accessing index 5 of a 5-element array, leading to a runtime panic and AMF crash.

Weakness: CWE-125

Which versions are affected by CVE-2025-70121?

It affects 1 product.

Products include Free5gc Free5gc.

How do I fix CVE-2025-70121?

No fix has been published for CVE-2025-70121 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2025-70121 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-70121 exists.

Other vulnerabilities in Free5gc Free5gc

• CVE-2026-44327 free5GC: NEF nnef-oam route group is unauthenticated; no-token requests reach the OAM handler Critical 10.0
• CVE-2026-44329 free5GC's SMF UPI management interface lacks auth middleware; unauthenticated topology read/write requests reach handlers Critical 10.0
• CVE-2026-44330 free5GC's NEF nnef-pfdmanagement API is unauthenticated; forged bearer tokens can read PFD data and create/delete PFD subscriptions Critical 10.0
• CVE-2025-63679 Memory corruption in n/a Critical 9.8
• CVE-2026-44315 free5GC's NEF 3gpp-pfd-management API is unauthenticated; forged bearer tokens can create, read, and delete PFD transactions Critical 9.4

All Free5gc Free5gc vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-x3j4-874w-h7pv.