CVE-2026-11622

ADVISORY - debian

Summary

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.

bind9 1:9.20.26-1 https://kb.isc.org/docs/cve-2026-11622

EPSS Score⁠: 0.00509 (0.404)

Common Weakness Enumeration (CWE)

ADVISORY - redhat

CWE-400⁠

Uncontrolled Resource Consumption

Impacted images

Advisories

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