Description
An integer truncation vulnerability in the NAS decoder of OpenAirInterface (OAI) CN5G AMF v2.2.1 allows an unauthenticated remote attacker to cause a denial of service (DoS) via crafted NAS Registration Requests containing a malformed IMEISV in the 5GS Mobile Identity IE. The Type6NasIe::Validate() function truncates a 32-bit length value to 16 bits, bypassing length validation and causing an out-of-bounds heap read in DecodeImeisv(), which can crash the AMF process.
Published: 2026-11-02
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Tue, 03 Nov 2026 19:15:00 +0000

Type Values Removed Values Added
Title Integer truncation in OpenAirInterface CN5G AMF NAS decoder allows unauthenticated DoS

Tue, 03 Nov 2026 17:15:00 +0000

Type Values Removed Values Added
Title Integer truncation in OpenAirInterface CN5G AMF NAS decoder allows unauthenticated DoS
Weaknesses CWE-125

Tue, 03 Nov 2026 14:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-197
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'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 03 Nov 2026 00:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-125

Mon, 02 Nov 2026 21:15:00 +0000

Type Values Removed Values Added
First Time appeared Openairinterface
Openairinterface oai-cn5g-amf
Vendors & Products Openairinterface
Openairinterface oai-cn5g-amf

Mon, 02 Nov 2026 19:00:00 +0000

Type Values Removed Values Added
Description An integer truncation vulnerability in the NAS decoder of OpenAirInterface (OAI) CN5G AMF v2.2.1 allows an unauthenticated remote attacker to cause a denial of service (DoS) via crafted NAS Registration Requests containing a malformed IMEISV in the 5GS Mobile Identity IE. The Type6NasIe::Validate() function truncates a 32-bit length value to 16 bits, bypassing length validation and causing an out-of-bounds heap read in DecodeImeisv(), which can crash the AMF process.
References

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Openairinterface Oai-cn5g-amf
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-11-03T13:28:29.224Z

Reserved: 2026-10-27T00:00:00.000Z

Link: CVE-2026-117069

cve-icon Vulnrichment

Updated: 2026-11-03T13:28:25.106Z

cve-icon NVD

Status : Deferred

Published: 2026-11-02T19:18:00.827

Modified: 2026-11-03T14:17:24.853

Link: CVE-2026-117069

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-03T19:00:21Z

Weaknesses