CVE-2026-19630
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.
- Score
- CVSS 3.1 7.5 High
- Status
- Awaiting Analysis - security-officer@isc.org
- Published
- 2026-10-21
- Last modified
- 2026-10-26
- Weaknesses
- CWE-407
Affected products
References
- https://kb.isc.org/docs/cve-2026-19630
- https://downloads.isc.org/isc/bind9/9.20.30
- https://downloads.isc.org/isc/bind9/9.21.27
