CVE-2025-69250

free5GC has Improper Error Handling in UDM, Leading to Information Exposure

State: Published
Severity: 6.6 Medium
Published: Feb 23, 2026
Updated: Feb 25, 2026
Reserved: Dec 30, 2025

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.

Scores

CVSS	Score	Vector	Source
4.0	6.6 Medium	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	GitHub_M

Weaknesses

CWE-754 Improper Check for Unusual or Exceptional Conditions
CWE-20 Improper Input Validation

Affected Products

Product	Versions
udmfree5gc	<= 1.4.1Affected

References

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