CVE-2025-56394 Memory corruption in n/a
A buffer overflow in Free5gc AMF allows attackers to execute arbitrary code or cause denial of service via malformed 5GS mobile identity.
- 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-2025-56394?
CVE-2025-56394 is a high-severity memory corruption vulnerability in Free5gc Free5gc, published on 23 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Free5gc 4.0.1 is vulnerable to Buffer Overflow. The AMF incorrectly validates the 5GS mobile identity, resulting in slice reference overflow.
Weakness: CWE-122
Which versions are affected by CVE-2025-56394?
It affects 1 product.
Products include Free5gc Free5gc.
How do I fix CVE-2025-56394?
No fix has been published for CVE-2025-56394 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-56394 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-56394 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-w9f3-92w7-x777.