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Vulnerabilities

CVE-2026-43205

High
CWE-787 — Weakness Type
Published: May 6, 2026  ·  Modified: May 13, 2026  ·  Source: NVD
CVSS v3
7.8
🔗 NVD Official
📄 Description (English)

In the Linux kernel, the following vulnerability has been resolved:

dpaa2-switch: validate num_ifs to prevent out-of-bounds write

The driver obtains sw_attr.num_ifs from firmware via dpsw_get_attributes()
but never validates it against DPSW_MAX_IF (64). This value controls
iteration in dpaa2_switch_fdb_get_flood_cfg(), which writes port indices
into the fixed-size cfg->if_id[DPSW_MAX_IF] array. When firmware reports
num_ifs >= 64, the loop can write past the array bounds.

Add a bound check for num_ifs in dpaa2_switch_init().

dpaa2_switch_fdb_get_flood_cfg() appends the control interface (port
num_ifs) after all matched ports. When num_ifs == DPSW_MAX_IF and all
ports match the flood filter, the loop fills all 64 slots and the control
interface write overflows by one entry.

The check uses >= because num_ifs == DPSW_MAX_IF is also functionally
broken.

build_if_id_bitmap() silently drops any ID >= 64:
if (id[i] < DPSW_MAX_IF)
bmap[id[i] / 64] |= ...

🤖 AI Executive Summary

A buffer overflow vulnerability exists in the Linux kernel's dpaa2-switch driver where unvalidated firmware-provided interface count (num_ifs) can exceed the fixed array size (DPSW_MAX_IF=64), causing out-of-bounds writes. This affects systems using NXP DPAA2 network switches, particularly in data center and telecom infrastructure. The vulnerability requires malicious or compromised firmware to trigger but can lead to kernel memory corruption and potential privilege escalation.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: May 12, 2026 01:37
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability primarily impacts Saudi organizations operating data centers, telecom infrastructure (STC, Mobily), and government cloud services utilizing NXP DPAA2 network switches. ARAMCO's IT infrastructure and SAMA's banking sector networks may be affected if they employ these switches in their network architecture. The vulnerability requires firmware-level compromise, making it a supply chain risk for organizations procuring network equipment. Impact is moderate for most organizations unless they specifically use DPAA2-based switches in critical network paths.
🏢 Affected Saudi Sectors
Telecommunications (STC, Mobily) Data Centers and Cloud Services Government IT Infrastructure Banking and Financial Services (SAMA regulated) Energy Sector (ARAMCO IT) Enterprise IT Infrastructure
⚖️ Saudi Risk Score (AI)
5.2
/ 10.0
🔧 Remediation Steps (English)
1. IMMEDIATE: Identify systems running Linux kernel with dpaa2-switch driver by checking kernel version and loaded modules (lsmod | grep dpaa2)
2. Apply kernel patch that adds validation check: num_ifs >= DPSW_MAX_IF should be rejected during dpaa2_switch_init()
3. Update to patched kernel versions (7.0-rc2 or later, or backported patches for stable branches)
4. Verify firmware integrity and source from trusted NXP channels only
5. Implement firmware signature verification if available
6. Monitor system logs for dpaa2-switch initialization errors
7. Detection: Monitor for kernel oops/panic messages related to dpaa2_switch_fdb_get_flood_cfg() or memory corruption patterns
8. Compensating control: Restrict firmware update access to authorized personnel only; implement secure boot to prevent unauthorized firmware modifications
🔧 خطوات المعالجة (العربية)
1. فوري: تحديد الأنظمة التي تقوم بتشغيل نواة Linux مع برنامج تشغيل dpaa2-switch عن طريق التحقق من إصدار النواة والوحدات المحملة (lsmod | grep dpaa2)
2. تطبيق رقعة النواة التي تضيف فحص التحقق: يجب رفض num_ifs >= DPSW_MAX_IF أثناء dpaa2_switch_init()
3. التحديث إلى إصدارات النواة المصححة (7.0-rc2 أو أحدث، أو الرقع المرتجعة للفروع المستقرة)
4. التحقق من سلامة البرامج الثابتة والحصول عليها من قنوات NXP الموثوقة فقط
5. تنفيذ التحقق من توقيع البرامج الثابتة إن أمكن
6. مراقبة سجلات النظام لأخطاء تهيئة dpaa2-switch
7. الكشف: مراقبة رسائل kernel oops/panic المتعلقة بـ dpaa2_switch_fdb_get_flood_cfg() أو أنماط تلف الذاكرة
8. التحكم التعويضي: تقييد وصول تحديث البرامج الثابتة للموظفين المصرح لهم فقط؛ تنفيذ التمهيد الآمن لمنع تعديلات البرامج الثابتة غير المصرح بها
📋 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 of access
🔵 SAMA CSF
ID.BE-5 - Organizational resilience PR.DS-6 - Integrity checking mechanisms DE.CM-1 - The network is monitored to detect potential cybersecurity events
🟡 ISO 27001:2022
A.12.2.1 - Monitoring and logging of access A.12.6.1 - Management of technical vulnerabilities A.14.2.1 - Secure development policy and procedures
📦 Affected Products / CPE 7 entries
linux:linux_kernel
linux:linux_kernel
linux:linux_kernel
linux:linux_kernel
linux:linux_kernel
linux:linux_kernel
linux:linux_kernel:7.0
📊 CVSS Score
7.8
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack VectorL — Low / Local
Attack ComplexityL — Low / Local
Privileges RequiredL — Low / Local
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityH — High
IntegrityH — High
AvailabilityH — High
📋 Quick Facts
Severity High
CVSS Score7.8
CWECWE-787
EPSS0.02%
Exploit No
Patch ✓ Yes
Published 2026-05-06
Source Feed nvd
🇸🇦 Saudi Risk Score
5.2
/ 10.0 — Saudi Risk
Priority: MEDIUM
🏷️ Tags
patch-available CWE-787
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