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Vulnerabilities

CVE-2026-3039

High
CWE-771 — Weakness Type
Published: May 20, 2026  ·  Modified: May 27, 2026  ·  Source: NVD
CVSS v3
7.5
🔗 NVD Official
📄 Description (English)

BIND servers that are configured to use TKEY-based authentication via GSS-API tokens are vulnerable to excessive memory consumption when receiving and processing maliciously-constructed packets. Typically these servers will be found in Active Directory integrated DNS deployments and/or Kerberos-secured DNS environments.
This issue affects BIND 9 versions 9.0.0 through 9.16.50, 9.18.0 through 9.18.48, 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, 9.9.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.

🤖 AI Executive Summary

BIND DNS servers using TKEY-based GSS-API authentication are vulnerable to excessive memory consumption via maliciously-crafted packets, potentially causing denial of service. This affects multiple BIND 9 versions commonly deployed in Active Directory and Kerberos-integrated environments.

📄 Description (Arabic)

خادم BIND DNS المكون لاستخدام المصادقة المستندة إلى TKEY عبر رموز GSS-API يعاني من ثغرة في معالجة الحزم المصممة بشكل ضار. يمكن للمهاجمين استغلال هذه الثغرة لاستنزاف موارد الذاكرة بشكل مفرط مما يؤدي إلى رفض الخدمة. تؤثر هذه المشكلة بشكل أساسي على بيئات Active Directory المدمجة وبيئات DNS المحمية بـ Kerberos.

🤖 ملخص تنفيذي (AI)

خوادم BIND DNS التي تستخدم المصادقة المستندة إلى TKEY عبر رموز GSS-API معرضة لاستهلاك الذاكرة المفرط من خلال حزم مصممة بشكل ضار. يؤثر هذا على إصدارات BIND 9 المتعددة المنتشرة بشكل شائع في بيئات Active Directory و Kerberos.

🤖 AI Intelligence Analysis Analyzed: May 21, 2026 23:40
🇸🇦 Saudi Arabia Impact Assessment
Saudi Relevance: high
🏢 Affected Saudi Sectors
government banking telecom healthcare
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
7.0
/ 10.0
🔧 Remediation Steps (English)
Immediately upgrade BIND to patched versions: 9.16.51 or later, 9.18.49 or later, 9.20.23 or later, 9.21.22 or later, or corresponding -S1 versions. If immediate patching is not possible, disable TKEY-based GSS-API authentication or implement network-level access controls to restrict DNS queries to trusted sources only.
🔧 خطوات المعالجة (العربية)
قم بالترقية الفورية إلى إصدارات BIND المصححة: 9.16.51 أو أحدث، 9.18.49 أو أحدث، 9.20.23 أو أحدث، 9.21.22 أو أحدث، أو الإصدارات -S1 المقابلة. إذا لم يكن الترقية الفورية ممكنة، قم بتعطيل المصادقة المستندة إلى TKEY GSS-API أو تطبيق عناصر تحكم على مستوى الشبكة لتقييد استعلامات DNS للمصادر الموثوقة فقط.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.12.6.1 A.13.1.1 A.14.2.1
🔵 SAMA CSF
ID.BE-5 PR.DS-6 DE.CM-1
🟡 ISO 27001:2022
27001:A.12.6.1 27001:A.13.1.1 27001:A.14.2.1
📦 Affected Products / CPE 4 entries
isc:bind
isc:bind
isc:bind
isc:bind
📊 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-771
EPSS0.09%
Exploit No
Patch ✓ Yes
Published 2026-05-20
Source Feed nvd
🇸🇦 Saudi Risk Score
7.0
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
patch-available CWE-771
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