CVE-2024-12705: ISC BIND 9

High severity, CVSS 7.5. EPSS: 18.4% chance of exploitation in the next 30 days.

Clients using DNS-over-HTTPS (DoH) can exhaust a DNS resolver's CPU and/or memory by flooding it with crafted valid or invalid HTTP/2 traffic. This issue affects BIND 9 versions 9.18.0 through 9.18.32, 9.20.0 through 9.20.4, 9.21.0 through 9.21.3, and 9.18.11-S1 through 9.18.32-S1.

Affected products

• ISC BIND 9: from 9.18.0, up to and including 9.18.32; from 9.20.0, up to and including 9.20.4; from 9.21.0, up to and including 9.21.3; from 9.18.11-S1, up to and including 9.18.32-S1

Published 2025-01-29. Last modified 2026-06-17.