CVE-2026-11605 — Unnecessary validation of DNSSEC signed records
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…
Published: 2026-07-22 · CVSS: 7.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7