CVEvulnerability
CVE-2026-44319
7.5 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2026-05-27
- Last modified
- 2026-10-14
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-20, CWE-617, CWE-755
Description
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF terminates the entire process when a stored PFD-subscription notifyUri cannot be reached. In PfdChangeNotifier.FlushNotifications(), the notifier calls NnefPFDmanagementNotify(...) and on any delivery error invokes logger.PFDManageLog.Fatal(err), which is os.Exit(1)-equivalent in Go. An attacker who can create a PFD subscription with an attacker-chosen notifyUri and then trigger a PFD change can deterministically kill NEF on the asynchronous delivery attempt -- the process exits with status 1, dropping NEF's entire SBI surface until restart. This vulnerability is fixed in 4.2.2.
Affected configurations
• free5gc free5gc (< 4.2.2)
Related
References
- https://github.com/free5gc/free5gc/issues/924 Exploit, Issue Tracking
- https://github.com/free5gc/free5gc/security/advisories/GHSA-rxrq-fv76-26pr Exploit, Vendor Advisory
- https://github.com/free5gc/nef/commit/f110517b1189801950b50668a593398687049074 Patch
- https://github.com/free5gc/nef/pull/25 Issue Tracking, Patch
- https://github.com/free5gc/free5gc/issues/924 Exploit, Issue Tracking
- https://github.com/free5gc/free5gc/security/advisories/GHSA-rxrq-fv76-26pr Exploit, Vendor Advisory