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Vulnerabilities

CVE-2026-24676

High
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0, AUDIN format renegotiation frees the active format list while the capture thread continues using audin->format, leadin
CWE-416 — Weakness Type
Published: Feb 9, 2026  ·  Modified: Feb 28, 2026  ·  Source: NVD
CVSS v3
7.5
🔗 NVD Official
📄 Description (English)

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0, AUDIN format renegotiation frees the active format list while the capture thread continues using audin->format, leading to a use after free in audio_format_compatible. This vulnerability is fixed in 3.22.0.

🤖 AI Executive Summary

FreeRDP versions prior to 3.22.0 contain a use-after-free vulnerability in AUDIN format renegotiation that could allow remote attackers to cause denial of service or potentially execute arbitrary code through malformed audio format messages. The vulnerability affects the audio capture thread's handling of format lists during renegotiation. A patch is available in version 3.22.0 and should be deployed immediately across all affected systems.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: May 4, 2026 17:16
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi organizations utilizing FreeRDP for remote desktop access, particularly in: (1) Banking sector (SAMA-regulated institutions) relying on RDP for secure remote administration; (2) Government agencies (NCA oversight) using RDP for inter-agency communications; (3) Healthcare facilities managing patient data remotely; (4) Energy sector (ARAMCO and subsidiaries) for critical infrastructure management; (5) Telecommunications providers (STC, Mobily) for network administration. The use-after-free could enable lateral movement within networks and compromise sensitive data during remote sessions.
🏢 Affected Saudi Sectors
Banking and Financial Services Government and Public Administration Healthcare Energy and Utilities Telecommunications Critical Infrastructure
⚖️ Saudi Risk Score (AI)
7.8
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all systems running FreeRDP versions prior to 3.22.0 using network scanning and asset inventory tools
2. Prioritize patching of systems in critical infrastructure, banking, and government sectors
3. Implement network segmentation to restrict RDP access to trusted networks only

PATCHING GUIDANCE:
1. Upgrade FreeRDP to version 3.22.0 or later immediately
2. For systems that cannot be patched immediately, disable AUDIN (audio input) functionality if not required
3. Test patches in non-production environments before deployment
4. Coordinate patching with change management procedures

COMPENSATING CONTROLS (if patching delayed):
1. Restrict RDP access using firewall rules to authorized IP ranges only
2. Implement VPN requirements for all remote desktop connections
3. Enable enhanced logging for RDP sessions and audio format negotiations
4. Monitor for abnormal audio format renegotiation patterns
5. Disable audio redirection in RDP sessions where not operationally required

DETECTION RULES:
1. Monitor for multiple rapid AUDIN format renegotiation attempts from single source
2. Alert on RDP sessions with audio format errors or crashes
3. Track FreeRDP process crashes with audio-related stack traces
4. Monitor for unusual memory access patterns in audio capture threads
5. Log all RDP connection attempts and format negotiation failures
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع الأنظمة التي تقوم بتشغيل إصدارات FreeRDP السابقة للإصدار 3.22.0 باستخدام أدوات المسح والمخزون
2. إعطاء الأولوية لتصحيح الأنظمة في البنية التحتية الحرجة والقطاع المصرفي والحكومي
3. تنفيذ تقسيم الشبكة لتقييد وصول RDP إلى الشبكات الموثوقة فقط

إرشادات التصحيح:
1. ترقية FreeRDP إلى الإصدار 3.22.0 أو أحدث فوراً
2. بالنسبة للأنظمة التي لا يمكن تصحيحها فوراً، قم بتعطيل وظيفة AUDIN (إدخال الصوت) إذا لم تكن مطلوبة
3. اختبر التصحيحات في بيئات غير الإنتاج قبل النشر
4. نسق التصحيح مع إجراءات إدارة التغيير

الضوابط البديلة (إذا تأخر التصحيح):
1. تقييد وصول RDP باستخدام قواعد جدار الحماية على نطاقات IP المصرح بها فقط
2. تنفيذ متطلبات VPN لجميع اتصالات سطح المكتب البعيد
3. تفعيل السجلات المحسنة لجلسات RDP ومفاوضات تنسيق الصوت
4. مراقبة أنماط إعادة التفاوض على تنسيق الصوت غير الطبيعية
5. تعطيل إعادة توجيه الصوت في جلسات RDP حيث لا تكون مطلوبة تشغيلياً

قواعد الكشف:
1. مراقبة محاولات إعادة التفاوض على تنسيق AUDIN السريعة والمتعددة من مصدر واحد
2. تنبيه على جلسات RDP مع أخطاء تنسيق الصوت أو الأعطال
3. تتبع أعطال عملية FreeRDP مع آثار مكدس متعلقة بالصوت
4. مراقبة أنماط الوصول إلى الذاكرة غير العادية في خيوط التقاط الصوت
5. تسجيل جميع محاولات الاتصال بـ RDP وفشل مفاوضات التنسيق
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.12.6.1 - Management of technical vulnerabilities ECC 2024 A.14.2.1 - Secure development policy ECC 2024 A.12.2.1 - Monitoring of systems and applications
🔵 SAMA CSF
ID.RA-1 - Asset management and vulnerability identification PR.IP-12 - Software development and change management DE.CM-8 - Vulnerability scans and assessments
🟡 ISO 27001:2022
A.12.6.1 - Management of technical vulnerabilities A.14.2.1 - Secure development policy and procedures A.12.2.1 - Monitoring of information systems
🟣 PCI DSS v4.0.1
Requirement 6.2 - Security patches and updates Requirement 11.2 - Vulnerability scanning
📦 Affected Products / CPE 1 entries
freerdp:freerdp
📊 CVSS Score
7.5
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredN — None / Network
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityN — None / Network
IntegrityN — None / Network
AvailabilityH — High
📋 Quick Facts
Severity High
CVSS Score7.5
CWECWE-416
EPSS0.02%
Exploit No
Patch ✓ Yes
Published 2026-02-09
Source Feed nvd
Views 5
🇸🇦 Saudi Risk Score
7.8
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
patch-available CWE-416
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