Description
If a BIND resolver is performing DNSSEC validation and encounters a maliciously crafted zone, the resolver may consume excessive CPU. Authoritative-only servers are generally unaffected, although there are circumstances where authoritative servers may make recursive queries (see: https://kb.isc.org/docs/why-does-my-authoritative-server-make-recursive-queries). This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.46, 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.46-S1, and 9.20.9-S1 through 9.20.20-S1.
CVSS 7.5EPSS 1.599%Risk 0.86
View source- Published
- 2026-03-25 14:16:33
- Affected versions
- <9.11.0, >=9.11.0, <9.16.50, >=9.16.0, <9.18.46, >=9.18.0, <9.20.20, >=9.20.0, <9.21.19, >=9.21.0
- Type
- Package
- Last modified
- 2026-08-03 13:17:13
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H