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Vulnerabilities

CVE-2026-34856

High
CWE-362 — Weakness Type
Published: Apr 13, 2026  ·  Modified: Apr 20, 2026  ·  Source: NVD
CVSS v3
7.3
🔗 NVD Official
📄 Description (English)

UAF vulnerability in the communication module.
Impact: Successful exploitation of this vulnerability may affect availability.

🤖 AI Executive Summary

CVE-2026-34856 is a Use-After-Free (UAF) vulnerability in HarmonyOS 6.0.0's communication module with a CVSS score of 7.3. While no public exploit is currently available, the vulnerability could be leveraged to cause denial of service or potentially achieve code execution. Organizations using HarmonyOS 6.0.0 should prioritize monitoring and implement compensating controls immediately, as no patch is currently available.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: May 5, 2026 22:16
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability primarily affects Saudi organizations using Huawei HarmonyOS 6.0.0 devices, particularly in telecommunications (STC, Mobily), government agencies, and enterprises with IoT deployments. The communication module vulnerability poses risks to availability and potential lateral movement in networked environments. Saudi critical infrastructure operators and ARAMCO subsidiaries using HarmonyOS-based systems should assess exposure. The lack of available patches increases risk for organizations unable to immediately upgrade or isolate affected systems.
🏢 Affected Saudi Sectors
Telecommunications (STC, Mobily, Zain) Government and Public Administration Banking and Financial Services Energy and Utilities (ARAMCO subsidiaries) Healthcare Enterprise IoT Deployments
⚖️ Saudi Risk Score (AI)
7.1
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Inventory all HarmonyOS 6.0.0 devices across your organization, particularly in critical and network-connected environments
2. Isolate or segment affected devices from critical networks where possible
3. Disable unnecessary communication module features if supported by your deployment
4. Implement enhanced monitoring on affected systems for abnormal process termination or service crashes

Patching Guidance:
1. Monitor Huawei security advisories for patch availability
2. Prepare upgrade plans to HarmonyOS versions beyond 6.0.0 when patches are released
3. Test patches in non-production environments before deployment

Compensating Controls:
1. Deploy network-level monitoring to detect unusual communication patterns from affected devices
2. Implement strict access controls limiting communication module interactions
3. Enable detailed logging of communication module activities
4. Use intrusion detection systems (IDS) to monitor for exploitation attempts
5. Establish incident response procedures for potential UAF exploitation

Detection Rules:
1. Monitor for unexpected process crashes or service restarts in HarmonyOS communication services
2. Alert on memory access violations originating from communication module processes
3. Track abnormal inter-process communication (IPC) patterns
4. Monitor for denial of service indicators affecting communication services
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. قم بحصر جميع أجهزة HarmonyOS 6.0.0 عبر مؤسستك، خاصة في البيئات الحرجة والمتصلة بالشبكة
2. عزل أو تقسيم الأجهزة المتأثرة عن الشبكات الحرجة إن أمكن
3. تعطيل ميزات وحدة الاتصالات غير الضرورية إن كانت مدعومة
4. تطبيق مراقبة محسّنة على الأنظمة المتأثرة للكشف عن إنهاء العمليات غير الطبيعي

إرشادات التصحيح:
1. مراقبة استشارات أمان Huawei لتوفر التصحيحات
2. تحضير خطط الترقية إلى إصدارات HarmonyOS بعد 6.0.0 عند توفر التصحيحات
3. اختبار التصحيحات في بيئات غير الإنتاج قبل النشر

الضوابط البديلة:
1. نشر المراقبة على مستوى الشبكة للكشف عن أنماط الاتصال غير المعتادة من الأجهزة المتأثرة
2. تطبيق ضوابط وصول صارمة تحد من تفاعلات وحدة الاتصالات
3. تفعيل السجلات التفصيلية لأنشطة وحدة الاتصالات
4. استخدام أنظمة كشف التسلل (IDS) لمراقبة محاولات الاستغلال
5. إنشاء إجراءات الاستجابة للحوادث لاستغلال UAF المحتمل

قواعد الكشف:
1. مراقبة أعطال العمليات غير المتوقعة أو إعادة تشغيل الخدمات في خدمات اتصالات HarmonyOS
2. التنبيه على انتهاكات الوصول إلى الذاكرة من عمليات وحدة الاتصالات
3. تتبع أنماط الاتصال بين العمليات (IPC) غير الطبيعية
4. مراقبة مؤشرات رفض الخدمة التي تؤثر على خدمات الاتصالات
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.5.1.1 - Information security policies and procedures A.8.1.1 - User access management A.12.2.1 - Change management procedures A.12.6.1 - Management of technical vulnerabilities
🔵 SAMA CSF
ID.RA-1 - Asset management and vulnerability identification PR.DS-6 - Data security and integrity DE.CM-1 - Detection and monitoring of anomalies RS.RP-1 - Response planning and procedures
🟡 ISO 27001:2022
A.12.6.1 - Management of technical vulnerabilities A.14.2.1 - Change management A.16.1.5 - Response to information security incidents A.5.1.1 - Information security policies
📦 Affected Products / CPE 1 entries
huawei:harmonyos:6.0.0
📊 CVSS Score
7.3
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Attack VectorL — Low / Local
Attack ComplexityL — Low / Local
Privileges RequiredN — None / Network
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityL — Low / Local
IntegrityL — Low / Local
AvailabilityH — High
📋 Quick Facts
Severity High
CVSS Score7.3
CWECWE-362
EPSS0.01%
Exploit No
Patch ✗ No
Published 2026-04-13
Source Feed nvd
Views 4
🇸🇦 Saudi Risk Score
7.1
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
CWE-362
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