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Vulnerabilities

CVE-2023-31364

Medium
Improper handling of direct memory writes in the input-output memory management unit could allow a malicious guest virtual machine (VM) to flood a host with writes, potentially causing a fatal machine
CWE-119 — Weakness Type
Published: Feb 26, 2026  ·  Modified: Mar 5, 2026  ·  Source: NVD
🔗 NVD Official
📄 Description (English)

Improper handling of direct memory writes in the input-output memory management unit could allow a malicious guest virtual machine (VM) to flood a host with writes, potentially causing a fatal machine check error resulting in denial of service.

🤖 AI Executive Summary

A vulnerability in IOMMU direct memory write handling allows malicious guest VMs to flood the host with writes, causing potential fatal machine check errors and denial of service. This affects virtualized environments where untrusted VMs could compromise host stability.

📄 Description (Arabic)

تؤثر هذه الثغرة على وحدات إدارة الذاكرة المدخلات والمخرجات (IOMMU) التي تفشل في التحقق بشكل صحيح من عمليات الكتابة المباشرة للذاكرة من الأجهزة الافتراضية الضيفة. يمكن لجهاز افتراضي ضار استغلال هذا الضعف لإرسال عدد كبير من عمليات الكتابة التي تسبب أخطاء فحص الآلة القاتلة. قد يؤدي هذا إلى توقف كامل النظام المضيف وفقدان الخدمة.

🤖 ملخص تنفيذي (AI)

ثغرة في معالجة كتابات الذاكرة المباشرة في IOMMU تسمح للأجهزة الافتراضية الضارة بإغراق المضيف بعمليات الكتابة، مما قد يسبب أخطاء فحص الآلة القاتلة وحالات الخدمة المرفوضة. يؤثر هذا على البيئات الافتراضية حيث قد تهدد الأجهزة الافتراضية غير الموثوقة استقرار المضيف.

🤖 AI Intelligence Analysis Analyzed: May 30, 2026 07:45
🇸🇦 Saudi Arabia Impact Assessment
Saudi Relevance: high
🏢 Affected Saudi Sectors
telecom government healthcare banking
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
7.0
/ 10.0
🔧 Remediation Steps (English)
Update hypervisor and IOMMU firmware to patched versions that implement proper rate limiting and validation of direct memory writes from guest VMs. Implement additional monitoring for abnormal IOMMU write patterns and restrict guest VM capabilities where possible.
🔧 خطوات المعالجة (العربية)
تحديث برنامج المراقب الفائق وثابت IOMMU إلى الإصدارات المصححة التي تطبق تحديد معدل مناسب والتحقق من صحة كتابات الذاكرة المباشرة من الأجهزة الافتراضية. تطبيق مراقبة إضافية لأنماط كتابة IOMMU غير الطبيعية وتقييد قدرات الأجهزة الافتراضية حيث أمكن.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.12.6.1 A.12.1.2
🔵 SAMA CSF
ID.BE-5 PR.PT-3
🟡 ISO 27001:2022
A.12.6.1 A.14.2.1
📋 Quick Facts
Severity Medium
CVSS Score
CWECWE-119
EPSS0.05%
Exploit No
Patch ✗ No
Published 2026-02-26
Source Feed nvd
Views 5
🇸🇦 Saudi Risk Score
7.0
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
CWE-119
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