CVE-2023-47345 free5gc Buffer Overflow vulnerability

What is CVE-2023-47345?

CVE-2023-47345 is a high-severity denial of service vulnerability in Free5gc Free5gc, published on 15 Nov 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Buffer Overflow vulnerability in free5gc 3.3.0 allows attackers to cause a denial of service via crafted PFCP message with malformed PFCP Heartbeat message whose Recovery Time Stamp IE length is mutated to zero.

Weakness: CWE-120

Which versions are affected by CVE-2023-47345?

2 open source packages ship an affected version, including github.com/free5gc/free5gc. It affects 1 product.

Products include Free5gc Free5gc.

How do I fix CVE-2023-47345?

No fix has been published for CVE-2023-47345 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-2023-47345 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-47345 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-6944-6pmv-6mp2.