EUVD-2026-67120
GHSA-fp5v-h3qw-c8gx
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Network-accessible CDR endpoint requires no credentials; crash-only impact limits scope entirely to availability with no confidentiality or integrity consequence.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
5DescriptionCVE.org
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.
AnalysisAI
NULL pointer dereference in free5gc v4.0.1's CDR processing path enables unauthenticated remote attackers to crash the 5G core network service by sending a crafted payload, causing a complete denial of service against the affected network function. The CVSS 7.5 score reflects a straightforward, credential-free network attack path requiring no complexity; however, EPSS places real-world exploitation probability at 0.18% (8th percentile), indicating limited threat actor interest at time of analysis. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The vulnerability requires network-level access to the CDR (Charging Data Record) processing path of a free5gc v4.0.1 deployment - specifically the component (likely CHF or adjacent function) that receives and parses CDR payloads. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.5 High score and AV:N/AC:L/PR:N/UI:N vector identify this as a low-friction, unauthenticated network attack - no credentials or special configuration are required to trigger the crash. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch has been identified at time of analysis - the sole reference is a GitHub issue (https://github.com/free5gc/free5gc/issues/759), not a tagged release or signed security advisory, so a confirmed fixed version cannot be cited. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all systems running free5gc v4.0.1 and confirm whether the CDR processing path is operationally active. …
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Same weakness CWE-476 – NULL Pointer Dereference
View allSame technique Denial Of Service
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External POC / Exploit Code
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