PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-30069 free5gc CVE debrief

A NULL pointer dereference in the UDMC registration handler component of free5gc v4.0.1 allows attackers to cause a Denial of Service (DoS) via supplying crafted payload. This vulnerability impacts free5gc deployments, specifically affecting the UDMC registration handler. The vulnerability class is related to improper handling of NULL pointer dereferences. The likely operational impact includes service disruption and potential system instability. Source confidence is based on CVE and NVD entries, but further verification is recommended.

Vendor
free5gc
Product
free5gc
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-27
Original CVE updated
2026-08-31
Advisory published
2026-08-27
Advisory updated
2026-08-31

Who should care

Administrators and users of free5gc v4.0.1 deployments should be aware of this vulnerability and take necessary actions to mitigate the risk. Affected operators include those managing free5gc infrastructure. Platform impact involves potential service disruptions. Vulnerability management teams should prioritize patching or mitigation efforts. Security teams should monitor for potential attacks and implement compensating controls if necessary. The vulnerability's impact on security teams includes the need for heightened monitoring and potential incident response planning.

Technical summary

The vulnerability is caused by a NULL pointer dereference in the UDMC registration handler component of free5gc v4.0.1. An attacker can cause a Denial of Service (DoS) by supplying a crafted payload. The affected product context indicates that free5gc v4.0.1 deployments are at risk. Defensive impact includes the need for immediate patching or mitigation to prevent potential attacks. The technical framing revolves around the improper handling of NULL pointers in the UDMC registration handler.

Defensive priority

High-priority defensive actions are required to address this vulnerability.

Recommended defensive actions

  • Verify the affected scope and inventory of free5gc v4.0.1 deployments.
  • Implement compensating controls to detect and prevent potential attacks.
  • Monitor for any updates or patches from the vendor.
  • Consider exception tracking for potential false positives.

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. Further investigation and verification are necessary to fully understand the vulnerability's impact and affected scope.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-30069 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-30069

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-30069 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-30069

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.