Description (CNA)
The issue is a resource exhaustion vulnerability associated with DNSSEC validation. BIND always validates all RRSIG records in an answer, even if they are not strictly needed. A query to an authoritative server/zone which returns many valid but superfluous RRSIG records causes the validator to waste disproportionate CPU time. This issue affects BIND 9 versions 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, and 9.20.9-S1 through 9.20.24-S1.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| ISC / BIND 9 | affected 9.20.0 through 9.20.24; affected 9.21.0 through 9.21.23; affected 9.20.9-S1 through 9.20.24-S1 |
CWE
CWE-408
References
- https://kb.isc.org/docs/cve-2026-11605
- https://downloads.isc.org/isc/bind9/9.20.26
- https://downloads.isc.org/isc/bind9/9.21.24
ADP enrichment
No English description supplied.
No references supplied.