CVE-2026-19630

HighCVSS 7.5/10Last modified Oct 26, 2026

Description

In a BIND resolver, inbound DNS protocol messages with a particular structure will result in additional processing, with no limit imposed by BIND. A DNS message with a maliciously large number of such structures will cause BIND to consume disproportionate amounts of CPU time and memory during processing. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.29, 9.21.0 through 9.21.26, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.29-S1.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-407

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
ISC	BIND 9	>= 9.11.0, <= 9.18.50; >= 9.20.0, <= 9.20.29; >= 9.21.0, <= 9.21.26; >= 9.11.3-S1, <= 9.18.50-S1; >= 9.20.9-S1, <= 9.20.29-S1

References

Timeline

Published: Oct 21, 2026
Last modified: Oct 26, 2026
NVD status: Awaiting Analysis

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