A NULL pointer dereference in the AMF NGAP Dispatcher component of free5gc v4.0.1 allows attackers to cause a Denial of Service (DoS) via supplying… (CVE-2026-30056)
Description
A NULL pointer dereference vulnerability exists in the AMF NGAP Dispatcher component of free5gc version 4.0.1. This flaw allows an attacker to cause a Denial of Service (DoS) by supplying crafted NGAP messages during the initialization of a new RAN connection. The vulnerability does not impact confidentiality or integrity but results in service disruption.
CVSS v3.1
Score 7.5high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-30056 describes a NULL pointer dereference in the AMF NGAP Dispatcher component of free5gc v4.0.1. An attacker can trigger this by sending specially crafted NGAP messages during the setup of a new RAN connection, causing the software to crash or become unavailable, leading to a denial of service condition. The vulnerability is identified as CWE-476 (NULL Pointer Dereference) and has a CVSS v3.1 base score of 7.5, indicating high severity due to its network attack vector, low attack complexity, no privileges required, and no user interaction needed. There is no information about a patch or remediation available at this time.
Potential Impact
The vulnerability allows remote attackers to cause a denial of service by crashing the AMF NGAP Dispatcher component in free5gc v4.0.1. This disrupts service availability but does not affect confidentiality or integrity of the system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider limiting exposure to untrusted NGAP messages or implementing network-level protections to restrict access to the affected component.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-x37g-h6m9-3g36
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-30056"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a91a872acd9273b49069c14
Added to database: 08/28/2026, 15:25:38 UTC
Last enriched: 09/08/2026, 04:22:39 UTC
Last updated: 10/13/2026, 18:48:19 UTC
Views: 54
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