📄 Description (English)
Deskflow is a keyboard and mouse sharing app. Prior to 1.26.0.138, a remote memory-safety vulnerability in Deskflow's clipboard deserialization allows a connected peer to trigger an out-of-bounds read by sending a malformed clipboard update. The issue is in the implementation of src/lib/deskflow/IClipboard.cpp. This is reachable because ClipboardChunk::assemble() in src/lib/deskflow/ClipboardChunk.cpp validates only the outer clipboard transfer size. It does not validate the internal structure of the serialized clipboard blob, so malformed inner lengths reach IClipboard::unmarshall() unchanged. This vulnerability is fixed in 1.26.0.138.
🤖 AI Executive Summary
CVE-2026-41476 is a critical remote memory-safety vulnerability in Deskflow versions prior to 1.26.0.138 that allows authenticated peers to trigger out-of-bounds reads through malformed clipboard deserialization. The vulnerability exists in clipboard chunk assembly validation, where only outer transfer sizes are validated while internal serialized structures bypass validation. With an available exploit and CVSS 8.8 severity, this poses immediate risk to organizations using Deskflow for cross-device input sharing, particularly in secure environments where clipboard data may contain sensitive information.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 28, 2026 19:48
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations using Deskflow for secure cross-device operations face significant risk, particularly: (1) Banking sector (SAMA-regulated) — clipboard data may contain authentication tokens, transaction details, or account information; (2) Government agencies (NCA oversight) — sensitive policy documents and communications at risk; (3) Healthcare providers — patient data and medical records in clipboard buffers; (4) Energy sector (ARAMCO, SABIC) — operational technology networks using Deskflow for administrative access; (5) Telecom operators (STC, Mobily) — network management systems relying on clipboard sharing. The out-of-bounds read could enable information disclosure, denial of service, or potential code execution in memory-adjacent regions.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Healthcare and Medical Services
Energy and Utilities
Telecommunications
Defense and Security
Education and Research
🎯 MITRE ATT&CK Techniques
T1005 - Data from Local System (clipboard data exfiltration)
T1041 - Exfiltration Over C2 Channel (clipboard contents)
T1056.004 - Peripheral Device Input (keyboard/mouse sharing abuse)
T1557 - Man-in-the-Middle (clipboard interception between peers)
T1499.004 - Application Exhaustion Flood (DoS via malformed clipboard chunks)
T1190 - Exploit Public-Facing Application (remote exploitation via peer connection)
⚖️ Saudi Risk Score (AI)
8.6
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all systems running Deskflow versions prior to 1.26.0.138 using asset inventory and network scanning
2. Isolate or restrict network access to affected Deskflow instances, particularly in production environments
3. Review clipboard access logs and audit trails for suspicious clipboard transfer attempts
4. Disable Deskflow clipboard sharing feature if possible until patching is complete
PATCHING GUIDANCE:
1. Upgrade all Deskflow installations to version 1.26.0.138 or later immediately
2. Prioritize patching in banking, government, and healthcare environments
3. Test patches in non-production environments before deployment
4. Implement staged rollout to minimize operational disruption
COMPENSATING CONTROLS (if immediate patching not possible):
1. Implement network segmentation to restrict Deskflow peer connections to trusted hosts only
2. Deploy host-based intrusion detection to monitor for abnormal clipboard operations
3. Restrict clipboard data to non-sensitive information only
4. Monitor process memory for unexpected access patterns
5. Implement application-level clipboard content filtering
DETECTION RULES:
1. Monitor for Deskflow processes with abnormal memory access patterns or segmentation faults
2. Alert on clipboard transfer operations with mismatched outer/inner size indicators
3. Track failed clipboard deserialization attempts in application logs
4. Monitor for Deskflow peer connections from unexpected network sources
5. Implement YARA rules to detect malformed clipboard chunk signatures in network traffic
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع الأنظمة التي تقوم بتشغيل إصدارات Deskflow السابقة للإصدار 1.26.0.138 باستخدام جرد الأصول والمسح الشبكي
2. عزل أو تقييد الوصول الشبكي إلى مثيلات Deskflow المتأثرة، خاصة في بيئات الإنتاج
3. مراجعة سجلات الوصول إلى الحافظة وسجلات التدقيق للكشف عن محاولات نقل الحافظة المريبة
4. تعطيل ميزة مشاركة الحافظة في Deskflow إن أمكن حتى اكتمال التصحيح
إرشادات التصحيح:
1. ترقية جميع تثبيتات Deskflow إلى الإصدار 1.26.0.138 أو أحدث على الفور
2. إعطاء الأولوية للتصحيح في بيئات البنوك والحكومة والرعاية الصحية
3. اختبار التصحيحات في بيئات غير الإنتاج قبل النشر
4. تنفيذ نشر مرحلي لتقليل الاضطراب التشغيلي
الضوابط التعويضية (إذا لم يكن التصحيح الفوري ممكناً):
1. تنفيذ تقسيم الشبكة لتقييد اتصالات نظراء Deskflow بالمضيفين الموثوقين فقط
2. نشر كشف الاختراق على مستوى المضيف لمراقبة عمليات الحافظة غير الطبيعية
3. تقييد بيانات الحافظة للمعلومات غير الحساسة فقط
4. مراقبة ذاكرة العملية للوصول غير المتوقع
5. تنفيذ تصفية محتوى الحافظة على مستوى التطبيق
قواعد الكشف:
1. مراقبة عمليات Deskflow بأنماط وصول ذاكرة غير طبيعية أو أخطاء التقسيم
2. التنبيه على عمليات نقل الحافظة ذات مؤشرات الحجم الخارجي/الداخلي غير المتطابقة
3. تتبع محاولات فك تسلسل الحافظة الفاشلة في سجلات التطبيق
4. مراقبة اتصالات نظراء Deskflow من مصادر شبكة غير متوقعة
5. تنفيذ قواعد YARA للكشف عن توقيعات أجزاء الحافظة المشوهة في حركة المرور الشبكية
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.12.2.1 - Change management procedures for security patches
ECC 2024 A.14.2.1 - Secure development and vulnerability management
ECC 2024 A.12.6.1 - Management of technical vulnerabilities
ECC 2024 A.5.2.1 - Information security policies and procedures
🔵 SAMA CSF
SAMA CSF ID.RA-1 - Asset management and vulnerability identification
SAMA CSF PR.IP-12 - Security patch management and updates
SAMA CSF DE.CM-1 - Detection and monitoring of security events
SAMA CSF RS.MI-1 - Incident response and containment procedures
🟡 ISO 27001:2022
ISO 27001:2022 A.12.6.1 - Management of technical vulnerabilities
ISO 27001:2022 A.14.2.1 - Secure development, testing and acceptance
ISO 27001:2022 A.12.2.1 - Change management
ISO 27001:2022 A.8.1.1 - Screening and vetting of personnel
🟣 PCI DSS v4.0.1
PCI DSS 6.2 - Security patches and updates for all system components
PCI DSS 11.2 - Vulnerability scanning and assessment
PCI DSS 6.1 - Secure development practices
📦 Affected Products / CPE 1 entries
deskflow:deskflow