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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-11622 Detail

Description

A DNSSEC validating resolver that is under a random subdomain attack against a DNSSEC-signed zone can suffer from runaway memory usage. The attacker needs to be able to send queries faster than the resolver can perform validation. The increased memory usage can be orders of magnitude beyond the limit configured in the `max-cache-size` parameter. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://downloads.isc.org/isc/bind9/9.20.26 Internet Systems Consortium (ISC)
https://downloads.isc.org/isc/bind9/9.21.24 Internet Systems Consortium (ISC)
https://kb.isc.org/docs/cve-2026-11622 Internet Systems Consortium (ISC)

Weakness Enumeration

CWE-ID CWE Name Source
CWE-770 Allocation of Resources Without Limits or Throttling Internet Systems Consortium (ISC)  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-11622
NVD Published Date:
07/22/2026
NVD Last Modified:
07/22/2026
Source:
Internet Systems Consortium (ISC)