CVE-2025-70123 Denial of service in n/a
Remote attackers can cause denial of service in free5GC UPF by sending malformed PFCP requests, disrupting SMF connections and service availability.
- 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-2025-70123?
CVE-2025-70123 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 improper input validation and protocol compliance vulnerability in free5GC v4.0.1 allows remote attackers to cause a denial of service. The UPF incorrectly accepts a malformed PFCP Association Setup Request, violating 3GPP TS 29.244. This places the UPF in an inconsistent state where a subsequent valid PFCP Session Establishment Request triggers a cascading failure, disrupting the SMF connection and causing service degradation.
Weakness: CWE-20
Which versions are affected by CVE-2025-70123?
It affects 1 product.
Products include Free5gc Free5gc.
How do I fix CVE-2025-70123?
No fix has been published for CVE-2025-70123 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-2025-70123 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-70123 exists.
Other vulnerabilities in Free5gc Free5gc
- CVE-2026-44327 free5GC: NEF nnef-oam route group is unauthenticated; no-token requests reach the OAM handler
- CVE-2026-44329 free5GC's SMF UPI management interface lacks auth middleware; unauthenticated topology read/write requests reach handlers
- CVE-2026-44330 free5GC's NEF nnef-pfdmanagement API is unauthenticated; forged bearer tokens can read PFD data and create/delete PFD subscriptions
- CVE-2025-63679 Memory corruption in n/a
- CVE-2026-44315 free5GC's NEF 3gpp-pfd-management API is unauthenticated; forged bearer tokens can create, read, and delete PFD transactions
Sources
Also known as GHSA-j98c-62jj-x3h3.