VULNERABILITY INTELLIGENCE

CVE-2026-33064

CVSS score7.5 HIGH

EPSS probability0.50%

CISA KEVNot currently listed

Published2026-03-20

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

Free5GC is an open-source Linux Foundation project for 5th generation (5G) mobile core networks. Versions prior to 1.4.2 are vulnerable to procedure panic caused by Nil Pointer Dereference in the /sdm-subscriptions endpoint. A remote attacker can cause the UDM service to panic and crash by sending a crafted POST request to the /sdm-subscriptions endpoint with a malformed URL path containing path traversal sequences (../) and a large JSON payload. The DataChangeNotificationProcedure function in notifier.go attempts to access a nil pointer without proper validation, causing a complete service crash with "runtime error: invalid memory address or nil pointer dereference". Exploitation would result in UDM functionality disruption until recovery by restart. This issue has been fixed in version 1.4.2.

Weakness classification

security-advisories@github.com: CWE-478
nvd@nist.gov: CWE-476

Primary references

security-advisories@github.com — Exploit, Issue Tracking, Patch, Vendor Advisory
security-advisories@github.com — Patch, Vendor Advisory
security-advisories@github.com — Patch
security-advisories@github.com — Issue Tracking, Patch