Vulnerability · Published Feb 23, 2026 · Assigned by GitHub_M

CVE-2025-69250free5GC has Improper Error Handling in UDM, Leading to Information Exposure

Medium 6.6

In plain English

A medium-severity improper input validation in udm from free5gc. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).

Severity (CVSS 4.0)6.6Medium

Exploit odds (30 days)0.5%top 59.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

free5gc UDM provides Unified Data Management (UDM) for free5GC, an open-source project for 5th generation (5G) mobile core networks. In versions up to and including 1.4.1, the service reliably leaks detailed internal error messages (e.g., strconv.ParseInt parsing errors) to remote clients when processing invalid pduSessionId inputs. This exposes implementation details and can be used for service fingerprinting. All deployments of free5GC using the UDM Nudm_UECM DELETE service may be vulnerable. 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.

Affected products (as reported)

Vendor	Product	Versions
free5gc	udm	<= 1.4.1

Weakness: CWE-754, CWE-20 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U

References

https://github.com/free5gc/free5gc/security/advisories/GHSA-6w77-5pqh-83rm x_refsource_CONFIRM
https://github.com/free5gc/free5gc/issues/750 x_refsource_MISC
https://github.com/free5gc/udm/pull/76 x_refsource_MISC
https://github.com/free5gc/udm/commit/504b14458d156558b3c0ade7107b86b3d5e72998 x_refsource_MISC