Amplified Resource Exhaustion Vulnerability in BIND Resolvers by ISC
CVE-2026-3592

5.3MEDIUM

Key Information:

Vendor

Isc
Status
Bind 9
Vendor
CVE Published:
20 May 2026

Badges

👾 Exploit Exists

What is CVE-2026-3592?

BIND resolvers are susceptible to an amplified resource consumption attack, where a specially crafted DNS query can lead to excessive resource utilization. This vulnerability exists across multiple BIND 9 versions, causing the affected resolvers to exhaust their computational resources, potentially leading to service outages and degraded performance.

Affected Version(s)

BIND 9 9.11.0 <= 9.16.50

BIND 9 9.18.0 <= 9.18.48

BIND 9 9.20.0 <= 9.20.22

References

https://kb.isc.org/docs/cve-2026-3592
vendor-advisory
https://downloads.isc.org/isc/bind9/9.18.49
patch
https://downloads.isc.org/isc/bind9/9.20.23
patch

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

ISC would like to thank Shuhan Zhang from Tsinghua University for bringing this vulnerability to our attention.
.