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CVE-2026-3039

BIND 9 server memory exhaustion during GSS-API TKEY negotiation

Published: May 20, 2026Updated: Jul 24, 2026 Sources: CVE List NVDCWE-771
7.5HIGH
NVD MITRE
EPSS Score
1.0%
Top 39.0%
CISA KEV
Not in KEV
Exploits
0 Known
Remediation
Patch Available
Self-Check
OpenVAS

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-771CWE-770

Affected Products

ISC
commercial·USaka internet systems consortium
bind
Networking Infrastructure
BIND 9
Networking Infrastructure

Exploitability

0 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
Workaround Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Impact
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References

https://downloads.isc.org/isc/bind9/9.18.49
downloads.isc.org
https://downloads.isc.org/isc/bind9/9.20.23
downloads.isc.org
https://downloads.isc.org/isc/bind9/9.21.22
downloads.isc.org
and 10 more references View all →

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