📄 Description (English)
In the Linux kernel, the following vulnerability has been resolved:
spi: meson-spicc: Fix double-put in remove path
meson_spicc_probe() registers the controller with
devm_spi_register_controller(), so teardown already drops the
controller reference via devm cleanup.
Calling spi_controller_put() again in meson_spicc_remove()
causes a double-put.
🤖 AI Executive Summary
CVE-2026-31489 is a double-put vulnerability in the Linux kernel's Meson SPI controller driver that can cause kernel memory corruption and system instability. The vulnerability occurs when the remove function incorrectly releases a reference to an SPI controller that was already freed by device manager cleanup, potentially leading to use-after-free conditions. While no public exploits are available, this affects systems running vulnerable Linux kernel versions with Meson SPI hardware.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 29, 2026 13:29
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability primarily affects Saudi organizations using embedded Linux systems and IoT devices with Meson SPI controllers, particularly in: (1) Telecommunications sector (STC, Mobily) — affecting network equipment and infrastructure devices; (2) Energy sector (ARAMCO, SEC) — impacting industrial control systems and SCADA devices; (3) Government agencies — affecting embedded systems in critical infrastructure; (4) Healthcare institutions — impacting medical devices and hospital infrastructure. The vulnerability could lead to kernel crashes, denial of service, and potential privilege escalation if combined with other exploits.
🏢 Affected Saudi Sectors
Telecommunications
Energy
Government
Healthcare
Industrial Control Systems
IoT/Embedded Systems
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
6.2
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Identify systems running Linux kernel versions 5.14 through 7.0-rc1 with Meson SPI hardware
2. Check kernel logs for SPI controller errors or unexpected crashes
3. Disable Meson SPI driver if not essential until patching is completed
Patching Guidance:
1. Update to Linux kernel version 7.0 final release or later
2. Apply upstream patch that removes the redundant spi_controller_put() call from meson_spicc_remove()
3. Verify patch application by reviewing driver code to ensure single reference release path
Compensating Controls:
1. Monitor kernel panic logs and system stability metrics
2. Implement watchdog timers to detect and recover from kernel hangs
3. Restrict physical access to devices with Meson SPI controllers
4. Use kernel module signing to prevent unauthorized driver modifications
Detection Rules:
1. Monitor for kernel messages: 'spi_controller_put' or 'meson_spicc_remove' in kernel logs
2. Alert on unexpected kernel panics or use-after-free warnings
3. Track SPI device enumeration changes during system operation
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد الأنظمة التي تقوم بتشغيل إصدارات نواة Linux من 5.14 إلى 7.0-rc1 مع أجهزة Meson SPI
2. التحقق من سجلات النواة للأخطاء أو الأعطال غير المتوقعة في وحدة التحكم SPI
3. تعطيل برنامج تشغيل Meson SPI إذا لم يكن ضروريًا حتى اكتمال التصحيح
إرشادات التصحيح:
1. التحديث إلى إصدار نواة Linux 7.0 النهائي أو أحدث
2. تطبيق الرقعة الأصلية التي تزيل استدعاء spi_controller_put() الزائد من meson_spicc_remove()
3. التحقق من تطبيق الرقعة بمراجعة كود برنامج التشغيل للتأكد من مسار إصدار مرجع واحد
الضوابط التعويضية:
1. مراقبة سجلات الذعر في النواة ومقاييس استقرار النظام
2. تنفيذ مؤقتات watchdog للكشف والتعافي من تعليق النواة
3. تقييد الوصول المادي إلى الأجهزة التي تحتوي على وحدات تحكم Meson SPI
4. استخدام توقيع وحدة النواة لمنع تعديلات برنامج التشغيل غير المصرح بها
قواعد الكشف:
1. مراقبة رسائل النواة: 'spi_controller_put' أو 'meson_spicc_remove' في سجلات النواة
2. التنبيه على حالات الذعر غير المتوقعة في النواة أو تحذيرات الاستخدام بعد التحرير
3. تتبع تغييرات تعداد جهاز SPI أثناء تشغيل النظام
📋 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 and logging
🔵 SAMA CSF
ID.RA-1 - Asset management and vulnerability identification
PR.IP-12 - System and information integrity
DE.CM-8 - Vulnerability scans
🟡 ISO 27001:2022
A.12.6.1 - Management of technical vulnerabilities
A.14.2.1 - Secure development and change management
A.12.2.1 - Information and event management
🔗 References & Sources 4
🔗
https://git.kernel.org/stable/c/40ad0334c17b23d8b66b1082ad1478a6202e90e2
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Patch
🔗
https://git.kernel.org/stable/c/63542bb402b7013171c9f621c28b609eda4dbf1f
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Patch
🔗
https://git.kernel.org/stable/c/9b812ceb75a6260c17c91db4b9e74ead8cfa06f5
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Patch
🔗
https://git.kernel.org/stable/c/da06a104f0486355073ff0d1bcb1fcbebb7080d6
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Patch
📦 Affected Products / CPE 16 entries
linux:linux_kernel
linux:linux_kernel
linux:linux_kernel
linux:linux_kernel
linux:linux_kernel
linux:linux_kernel
linux:linux_kernel
linux:linux_kernel
linux:linux_kernel:5.14
linux:linux_kernel:7.0
linux:linux_kernel:7.0
linux:linux_kernel:7.0
linux:linux_kernel:7.0
linux:linux_kernel:7.0
linux:linux_kernel:7.0
linux:linux_kernel:7.0