Description
A NULL pointer dereference in the CDR processing path of free5gc v4.0.1 allows attackers to cause a Denial of Service (DoS) via supplying crafted payload.
Published: 2026-08-27
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: Denial of Service
Action: Patch
AI Analysis

Impact

A null pointer dereference in the CDR processing path of free5gc v4.0.1 can be triggered by supplying crafted payloads, causing the software to crash and resulting in a denial of service. The weakness stems from improper null pointer validation and is classified as CWE-476.

Affected Systems

The affected product is the free5gc open‑source 5G core network software, version 4.0.1. No other vendors or product versions are listed as impacted.

Risk and Exploitability

The vulnerability can be exploited by sending specially crafted CDR data to a free5gc instance via the network. The EPSS score of < 1% indicates a very low likelihood of exploitation, and the issue is not listed in the CISA KEV catalog. The CVSS score of 7.5 reflects a high severity for availability impact, but the low exploitation probability mitigates the overall risk profile.

Generated by OpenCVE AI on August 31, 2026 at 17:51 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade free5gc to the latest stable release (e.g., v4.0.2 or later) which contains a fix for the null pointer dereference.
  • Implement input validation or filtering rules to reject malformed or oversized CDR payloads that could trigger the crash.
  • Set up monitoring of system logs and crash reports to quickly detect and respond to any segmentation fault or crash events related to CDR processing.

Generated by OpenCVE AI on August 31, 2026 at 17:51 UTC.

Tracking

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Advisories

No advisories yet.

History

Mon, 31 Aug 2026 18:15:00 +0000

Type Values Removed Values Added
Title Null Pointer Dereference in CDR Processing Leading to Denial of Service

Mon, 31 Aug 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 31 Aug 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Thu, 27 Aug 2026 18:00:00 +0000

Type Values Removed Values Added
Title Null Pointer Dereference in CDR Processing Leading to Denial of Service
First Time appeared Free5gc
Free5gc free5gc
Weaknesses CWE-476
Vendors & Products Free5gc
Free5gc free5gc

Thu, 27 Aug 2026 16:45:00 +0000

Type Values Removed Values Added
Description A NULL pointer dereference in the CDR processing path of free5gc v4.0.1 allows attackers to cause a Denial of Service (DoS) via supplying crafted payload.
References

Subscriptions

Free5gc Free5gc
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-08-31T16:07:23.676Z

Reserved: 2026-03-04T00:00:00.000Z

Link: CVE-2026-30072

cve-icon Vulnrichment

Updated: 2026-08-31T16:07:16.345Z

cve-icon NVD

Status : Deferred

Published: 2026-08-27T17:17:52.320

Modified: 2026-08-31T20:59:32.817

Link: CVE-2026-30072

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-31T18:00:03Z

Weaknesses