Amplified Resource Consumption in BIND 9 Resolvers (9.11-9.21.21)
CVE-2026-3592 Published on May 20, 2026

Amplification vulnerabilities via self-pointed glue records
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.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2026-3592 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a small impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
NONE
Availability Impact:
LOW

Weakness Type

Incorrect Behavior Order: Early Amplification

The software allows an entity to perform a legitimate but expensive operation before authentication or authorization has taken place.


Products Associated with CVE-2026-3592

Want to know whenever a new CVE is published for ISC BIND? stack.watch will email you.

ISC BIND
 

Affected Versions

ISC BIND 9: