📄 Description (English)
In the Linux kernel, the following vulnerability has been resolved:
driver core: platform: use generic driver_override infrastructure
When a driver is probed through __driver_attach(), the bus' match()
callback is called without the device lock held, thus accessing the
driver_override field without a lock, which can cause a UAF.
Fix this by using the driver-core driver_override infrastructure taking
care of proper locking internally.
Note that calling match() from __driver_attach() without the device lock
held is intentional. [1]
🤖 AI Executive Summary
CVE-2026-31527 is a use-after-free (UAF) vulnerability in the Linux kernel's platform driver core affecting driver_override field access during device probing. The vulnerability occurs when the match() callback is invoked without proper device locking, potentially allowing local attackers to cause denial of service or execute arbitrary code. A patch is available and should be prioritized for deployment across Saudi infrastructure.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 29, 2026 15:08
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability primarily impacts Saudi organizations running Linux-based infrastructure, particularly: (1) Government agencies and NCA systems relying on Linux servers for critical operations; (2) ARAMCO and energy sector SCADA/ICS systems using Linux platforms; (3) Banking sector (SAMA-regulated) utilizing Linux for backend services and payment processing; (4) Telecom operators (STC, Mobily) managing network infrastructure on Linux; (5) Healthcare institutions using Linux-based medical systems. Local privilege escalation and DoS attacks could disrupt critical services.
🏢 Affected Saudi Sectors
Government
Banking/Financial Services (SAMA-regulated)
Energy/Oil & Gas (ARAMCO)
Telecommunications (STC, Mobily)
Healthcare
Critical Infrastructure
Defense/Military
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
7.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Inventory all Linux systems across your organization, prioritizing production servers and critical infrastructure
2. Identify kernel versions affected (7.0-rc1 through rc4 and earlier versions with driver_override implementation)
3. Assess exposure: focus on systems with untrusted local user access or containerized environments
PATCHING GUIDANCE:
1. Apply kernel security updates from your Linux distribution (RHEL, Ubuntu, SLES, etc.) immediately
2. For RHEL/CentOS: Execute 'yum update kernel' and reboot systems during maintenance windows
3. For Ubuntu: Run 'apt update && apt upgrade linux-image-*' followed by reboot
4. Verify patch application: Check kernel version with 'uname -r' and confirm driver_override locking is implemented
5. Prioritize patching for: kernel 7.0-rc versions, systems with driver hotplug enabled, and multi-tenant environments
COMPENSATING CONTROLS (if immediate patching delayed):
1. Restrict local user access and disable unnecessary driver loading via modprobe blacklist
2. Implement AppArmor or SELinux policies to restrict driver_override access
3. Monitor sysfs driver_override file access: 'auditctl -w /sys/bus/platform/drivers/ -p wa -k driver_override_monitor'
4. Disable dynamic driver binding where possible: echo 0 > /sys/bus/platform/drivers_autoprobe
DETECTION RULES:
1. Monitor kernel logs for UAF-related crashes: grep -i 'use-after-free\|uaf\|double-free' /var/log/kern.log
2. Track sysfs modifications: auditctl -w /sys/bus/platform/drivers -p wa
3. Alert on unexpected driver_override modifications in /sys/bus/platform/devices/*/driver_override
4. Monitor for kernel panic events correlating with driver probe operations
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. قم بحصر جميع أنظمة لينكس في مؤسستك، مع إعطاء الأولوية لخوادم الإنتاج والبنية التحتية الحرجة
2. حدد إصدارات النواة المتأثرة (7.0-rc1 حتى rc4 والإصدارات السابقة)
3. قيّم التعرض: ركز على الأنظمة التي تحتوي على وصول مستخدم غير موثوق به
إرشادات التصحيح:
1. طبّق تحديثات أمان النواة من توزيعة لينكس الخاصة بك فوراً
2. لـ RHEL/CentOS: نفّذ 'yum update kernel' وأعد التشغيل
3. لـ Ubuntu: شغّل 'apt update && apt upgrade linux-image-*' متبوعاً بإعادة التشغيل
4. تحقق من تطبيق التصحيح باستخدام 'uname -r'
5. أعطِ الأولوية لتصحيح الإصدارات 7.0-rc والأنظمة متعددة المستأجرين
الضوابط البديلة:
1. قيّد وصول المستخدمين المحليين وعطّل تحميل المشغلات غير الضرورية
2. طبّق سياسات AppArmor أو SELinux
3. راقب الوصول إلى ملف driver_override
4. عطّل ربط المشغل الديناميكي حيث أمكن
قواعد الكشف:
1. راقب سجلات النواة للأخطاء المتعلقة بـ UAF
2. تتبع تعديلات sysfs
3. نبّه عند تعديلات driver_override غير المتوقعة
4. راقب أحداث kernel panic المرتبطة بعمليات فحص المشغل
📋 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.12.3.1 - Configuration management
🔵 SAMA CSF
SAMA CSF ID.RA-1 - Asset Management and Vulnerability Management
SAMA CSF PR.IP-12 - Security patch and update management
SAMA CSF DE.CM-8 - Malicious code detection
🟡 ISO 27001:2022
ISO 27001:2022 A.12.3.1 - Configuration management
ISO 27001:2022 A.12.6.1 - Management of technical vulnerabilities
ISO 27001:2022 A.14.2.1 - Secure development policy
🟣 PCI DSS v4.0.1
PCI DSS 6.2 - Security patches for system components
PCI DSS 11.2 - Vulnerability scanning and management
🔗 References & Sources 4
🔗
https://git.kernel.org/stable/c/2b38efc05bf7a8568ec74bfffea0f5cfa62bc01d
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Patch
🔗
https://git.kernel.org/stable/c/7c02a9bd7d14a89065fcf672b86d8e1d1a41d3b1
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Patch
🔗
https://git.kernel.org/stable/c/9a6086d2a828dd2ff74cf9abcae456670febd71f
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Patch
🔗
https://git.kernel.org/stable/c/edee7ee5a14c3b33f6d54641f5af5c5e9180992d
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Patch
📦 Affected Products / CPE 7 entries
linux:linux_kernel
linux:linux_kernel
linux:linux_kernel
linux:linux_kernel:7.0
linux:linux_kernel:7.0
linux:linux_kernel:7.0
linux:linux_kernel:7.0