CVE-2026-3039

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://downloads.isc.org/isc/bind9/9.18.49	Patch
https://downloads.isc.org/isc/bind9/9.20.23	Patch
https://downloads.isc.org/isc/bind9/9.21.22	Patch
https://kb.isc.org/docs/cve-2026-3039	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:isc:bind:::::-:::*
	cpe:2.3:a:isc:bind:::::-:::*
	cpe:2.3:a:isc:bind:::::-:::*
	cpe:2.3:a:isc:bind:::::-:::*

History

21 May 2026, 15:24

Type	Values Removed	Values Added
CPE		cpe:2.3:a:isc:bind:::::-:::*
First Time		Isc bind Isc
References	~~() https://downloads.isc.org/isc/bind9/9.18.49 -~~	() https://downloads.isc.org/isc/bind9/9.18.49 - Patch
References	~~() https://downloads.isc.org/isc/bind9/9.20.23 -~~	() https://downloads.isc.org/isc/bind9/9.20.23 - Patch
References	~~() https://downloads.isc.org/isc/bind9/9.21.22 -~~	() https://downloads.isc.org/isc/bind9/9.21.22 - Patch
References	~~() https://kb.isc.org/docs/cve-2026-3039 -~~	() https://kb.isc.org/docs/cve-2026-3039 - Vendor Advisory

20 May 2026, 13:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-20 13:16

Updated : 2026-05-21 15:24

NVD link : CVE-2026-3039

Mitre link : CVE-2026-3039

CVE.ORG link : CVE-2026-3039

JSON object : View

Products Affected

isc

bind

CWE

CWE-771

Missing Reference to Active Allocated Resource

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