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Vulnerabilities

CVE-2026-34332

High
CWE-416 — Weakness Type
Published: May 12, 2026  ·  Modified: May 19, 2026  ·  Source: NVD
CVSS v3
8.0
🔗 NVD Official
📄 Description (English)

Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to execute code over a network.

🤖 AI Executive Summary

CVE-2026-34332 is a use-after-free vulnerability in Windows Server 2025 kernel-mode drivers with a CVSS score of 8.0, allowing authorized attackers to execute arbitrary code over the network. This critical flaw affects Windows Server infrastructure widely deployed in Saudi organizations, particularly in government and enterprise environments. The absence of available patches necessitates immediate compensating controls and network segmentation strategies. Organizations should prioritize this vulnerability given the high severity and potential for lateral movement within critical infrastructure.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: May 16, 2026 22:14
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi government agencies (NCA, MISA), SAMA-regulated financial institutions, healthcare providers (MOH), energy sector (Saudi Aramco, SEC), and telecommunications operators (STC, Mobily). Windows Server 2025 is extensively deployed in data centers and critical infrastructure across these sectors. The use-after-free vulnerability in kernel drivers could enable privilege escalation and lateral movement, potentially compromising sensitive government systems, financial transaction processing, and critical infrastructure operations. Organizations managing SCADA systems or industrial control systems running Windows Server are particularly vulnerable.
🏢 Affected Saudi Sectors
Government (NCA, MISA, Ministry of Interior) Banking and Financial Services (SAMA-regulated institutions) Healthcare (Ministry of Health) Energy (Saudi Aramco, SEC) Telecommunications (STC, Mobily) Critical Infrastructure Defense and Military Education (Universities)
⚖️ Saudi Risk Score (AI)
8.5
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Inventory all Windows Server 2025 deployments across your organization and document kernel-mode driver versions
2. Implement network segmentation to restrict access to affected servers, limiting connections to authorized personnel only
3. Enable Enhanced Mitigation Experience Toolkit (EMET) or Windows Defender Exploit Guard on all Windows Server 2025 systems
4. Restrict administrative access and implement principle of least privilege for all user accounts
5. Monitor for suspicious kernel-mode driver activity using Windows Event Viewer (Event ID 7045 for driver installation)

Compensating Controls:
6. Deploy host-based intrusion detection systems (HIDS) to monitor for exploitation attempts
7. Implement application whitelisting to prevent unauthorized code execution
8. Enable Kernel Patch Protection (KPP) and Code Integrity checks
9. Configure Windows Defender for real-time protection with cloud-delivered protection enabled
10. Implement network access controls (NAC) to prevent unauthorized lateral movement

Detection Rules:
11. Monitor for abnormal kernel-mode driver behavior using ETW (Event Tracing for Windows) providers
12. Alert on unexpected memory access patterns in kernel space
13. Track all driver loading events and compare against baseline
14. Monitor for use-after-free exploitation signatures in memory dumps

Patching Strategy:
15. Subscribe to Microsoft Security Update Guide for emergency patches
16. Prepare rollback procedures before applying any interim patches
17. Test patches in isolated lab environment before production deployment
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. قم بحصر جميع نشرات Windows Server 2025 في مؤسستك وتوثيق إصدارات برامج تشغيل نواة النظام
2. تطبيق تقسيم الشبكة لتقييد الوصول إلى الخوادم المتأثرة، مع تحديد الاتصالات للموظفين المصرحين فقط
3. تفعيل أدوات تحسين الحماية المحسنة (EMET) أو Windows Defender Exploit Guard على جميع أنظمة Windows Server 2025
4. تقييد الوصول الإداري وتطبيق مبدأ الامتياز الأقل لجميع حسابات المستخدمين
5. مراقبة نشاط برامج تشغيل نواة النظام المريبة باستخدام عارض أحداث Windows (معرف الحدث 7045 لتثبيت برنامج التشغيل)

الضوابط التعويضية:
6. نشر أنظمة الكشف عن التطفل على المضيف (HIDS) لمراقبة محاولات الاستغلال
7. تطبيق القائمة البيضاء للتطبيقات لمنع تنفيذ الكود غير المصرح به
8. تفعيل حماية تصحيح النواة (KPP) وفحوصات سلامة الكود
9. تكوين Windows Defender للحماية في الوقت الفعلي مع تفعيل الحماية المسلمة من السحابة
10. تطبيق ضوابط الوصول إلى الشبكة (NAC) لمنع الحركة الجانبية غير المصرح بها

قواعد الكشف:
11. مراقبة سلوك برامج تشغيل نواة النظام غير الطبيعي باستخدام موفري ETW
12. تنبيه على أنماط الوصول إلى الذاكرة غير المتوقعة في مساحة النواة
13. تتبع جميع أحداث تحميل برنامج التشغيل ومقارنتها مع خط الأساس
14. مراقبة توقيعات استغلال use-after-free في ملفات تفريغ الذاكرة

استراتيجية التصحيح:
15. الاشتراك في دليل تحديث أمان Microsoft للحصول على التصحيحات الطارئة
16. تحضير إجراءات التراجع قبل تطبيق أي تصحيحات مؤقتة
17. اختبار التصحيحات في بيئة معملية معزولة قبل نشرها في الإنتاج
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.5.1.1 - Information Security Policies and Procedures A.6.1.1 - Organization of Information Security A.8.1.1 - Asset Management A.12.2.1 - Restrictions on Software Installation A.12.6.1 - Management of Technical Vulnerabilities
🔵 SAMA CSF
ID.AM-2 - Software Inventory PR.DS-6 - Integrity Checking Mechanisms PR.PT-2 - Removable Media Protection DE.CM-8 - Vulnerability Scans RS.MI-2 - Incident Response Procedures
🟡 ISO 27001:2022
A.12.6.1 - Management of technical vulnerabilities A.14.2.1 - Secure development policy A.12.2.1 - Restrictions on software installation A.8.1.3 - Segregation of duties A.13.1.3 - Segregation of networks
🟣 PCI DSS v4.0.1
6.2 - Security patches and updates 6.5.1 - Injection flaws 11.2 - Vulnerability scanning 12.2 - Configuration standards
📦 Affected Products / CPE 1 entries
microsoft:windows_server_2025
📊 CVSS Score
8.0
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredL — Low / Local
User InteractionR — Required
ScopeU — Unchanged
ConfidentialityH — High
IntegrityH — High
AvailabilityH — High
📋 Quick Facts
Severity High
CVSS Score8.0
CWECWE-416
EPSS0.06%
Exploit No
Patch ✗ No
Published 2026-05-12
Source Feed nvd
🇸🇦 Saudi Risk Score
8.5
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
CWE-416
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