8.7

CVE-2026-33064

Exploit

free5GC UDM DataChangeNotification Procedure Panic Due to Nil Pointer Dereference

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Free5gc ≫ Udm SwPlatformgo Version < 1.4.2
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.49% 0.379
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
security-advisories@github.com 8.7 0 0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

CWE-478 Missing Default Case in Multiple Condition Expression

The code does not have a default case in an expression with multiple conditions, such as a switch statement.

https://github.com/free5gc/free5gc/issues/781
Patch
Vendor Advisory
Exploit
Issue Tracking
https://github.com/free5gc/free5gc/security/advisories/GHSA-7g27-v5wj-jr75
Patch
Vendor Advisory
https://github.com/free5gc/udm/commit/65d7070f4bfd016864cbbaefbd506bbc85d2fa92
Patch
https://github.com/free5gc/udm/pull/78
Patch
Issue Tracking