BIND resolvers are vulnerable to an amplified resource consumption/exhaustion attack. If a victim resolver makes a query to a specially crafted zone, the resolver will consume disproportionate resources.
This issue affects BIND 9 versions 9.11.0 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, 9.11.3-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 CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00016.

Exploitation none

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
ISC BIND 9 unaffected
Version Status Constraints
9.11.0 affected ≤ 9.16.50
9.18.0 affected ≤ 9.18.48
9.20.0 affected ≤ 9.20.22
9.21.0 affected ≤ 9.21.21
9.11.3-S1 affected ≤ 9.16.50-S1
9.18.11-S1 affected ≤ 9.18.48-S1
9.20.9-S1 affected ≤ 9.20.22-S1

Configuration 1 [-]

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:*:*:*:*:-:*:*:*

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
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Project Subscriptions

Vendors Products
Isc Subscribe
Bind Subscribe
Advisories
Source ID Title
Debian DSA Debian DSA DSA-6285-1 bind9 security update
Ubuntu USN Ubuntu USN USN-8293-1 Bind vulnerabilities
Fixes

Solution

Upgrade to the patched release most closely related to your current version of BIND 9: 9.18.49, 9.20.23, 9.21.22, 9.18.49-S1, or 9.20.23-S1.

Workaround

No workarounds known.

References
Link Providers
https://downloads.isc.org/isc/bind9/9.18.49 cve-icon cve-icon
https://downloads.isc.org/isc/bind9/9.20.23 cve-icon cve-icon
https://downloads.isc.org/isc/bind9/9.21.22 cve-icon cve-icon
https://kb.isc.org/docs/cve-2026-3592 cve-icon cve-icon
History

Thu, 21 May 2026 15:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*

Wed, 20 May 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 20 May 2026 13:15:00 +0000

Type Values Removed Values Added
Description BIND resolvers are vulnerable to an amplified resource consumption/exhaustion attack. If a victim resolver makes a query to a specially crafted zone, the resolver will consume disproportionate resources. This issue affects BIND 9 versions 9.11.0 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, 9.11.3-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.
Title Amplification vulnerabilities via self-pointed glue records
First Time appeared Isc
Isc bind
Weaknesses CWE-408
CPEs cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*
Vendors & Products Isc
Isc bind
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: isc

Published:

Updated: 2026-05-20T13:42:21.764Z

Reserved: 2026-03-05T12:53:33.956Z

Link: CVE-2026-3592

cve-icon Vulnrichment

Updated: 2026-05-20T13:42:17.866Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-20T13:16:23.790

Modified: 2026-05-21T15:24:25.007

Link: CVE-2026-3592

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-20T15:45:33Z

Weaknesses