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ISC BIND 9 EUVD-2026-31106

| CVE-2026-3592 MEDIUM
Incorrect Behavior Order: Early Amplification (CWE-408)
2026-05-20 isc GHSA-63mj-2fw3-4w3h
5.3
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

Lifecycle Timeline

1
Analysis Generated
May 20, 2026 - 13:34 vuln.today

DescriptionNVD

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.

AnalysisAI

Amplified resource exhaustion in ISC BIND 9 resolvers enables remote unauthenticated attackers to cause disproportionate resource consumption by directing a victim resolver to query a specially crafted authoritative DNS zone. All major BIND 9 resolver branches are affected, spanning versions 9.11.x through 9.21.x including BIND 9 Supported (S1) variants, representing a broad deployment footprint across enterprise and ISP resolver infrastructure. …

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Vendor StatusVendor

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EUVD-2026-31106 vulnerability details – vuln.today

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