NULL pointer dereference in Free5gc Udm
CVE-2025-69252
free5gc UDM provides Unified Data Management (UDM) for free5GC, an open-source project for 5th generation (5G) mobile core networks. Versions up to and including 1.4.1 have a NULL Pointer Dereference vulnerability. Remote unauthenticated attackers can trigger a service panic (Denial of Service) by sending a crafted PUT request with an unexpected ueId, crashing the UDM service. All deployments of free5GC using the UDM component may be affected. free5gc/udm pull request 76 contains a fix for the issue. No direct workaround is available at the application level. Applying the official patch is recommended.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (42.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000
Affected products
- Free5gc Udm — versions <= 1.4.1
Weakness classification (CWE)
References
- github.com/free5gc/free5gc/security/advisories/GHSA-v8cv-qvf6-9rpm (Patch, Vendor Advisory)
- github.com/free5gc/free5gc/issues/752 (Exploit, Patch, Issue Tracking, Vendor Advisory)
- github.com/free5gc/udm/pull/76 (Issue Tracking)
- github.com/free5gc/udm/commit/504b14458d156558b3c0ade7107b86b3d5e72998 (Patch)
Frequently asked questions
- What is CVE-2025-69252?
- CVE-2025-69252 is a high-severity vulnerability in Free5gc Udm, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2026-02-24.
- How severe is CVE-2025-69252?
- High severity. CVSS v3 base score is 7.5 out of 10.