CVE-2024-1975: ISC BIND

High severity, CVSS 7.5. EPSS: 2.1% chance of exploitation in the next 30 days.

If a server hosts a zone containing a "KEY" Resource Record, or a resolver DNSSEC-validates a "KEY" Resource Record from a DNSSEC-signed domain in cache, a client can exhaust resolver CPU resources by sending a stream of SIG(0) signed requests. This issue affects BIND 9 versions 9.0.0 through 9.11.37, 9.16.0 through 9.16.50, 9.18.0 through 9.18.27, 9.19.0 through 9.19.24, 9.9.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.49-S1, and 9.18.11-S1 through 9.18.27-S1.

Affected products

• ISC BIND: from 9.0, up to and including 9.11.37; from 9.16.0, up to and including 9.16.50; from 9.16.8, up to and including 9.16.49-s1; from 9.18.0, up to and including 9.18.27; from 9.18.11, up to and including 9.18.27-s1; from 9.19.0, up to and including 9.19.24; …
• ISC BIND 9: from 9.0.0, up to and including 9.11.37; from 9.16.0, up to and including 9.16.50; from 9.18.0, up to and including 9.18.27; from 9.19.0, up to and including 9.19.24; from 9.9.3-S1, up to and including 9.11.37-S1; from 9.16.8-S1, up to and including 9.16.49-S1; …

Published 2024-07-23. Last modified 2026-06-17.