Overview
Description
A `named` caching resolver that is configured to send ECS (EDNS Client Subnet) options may be vulnerable to a cache-poisoning attack.
This issue affects BIND 9 versions 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.37-S1, and 9.20.9-S1 through 9.20.10-S1.
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Fediverse

🚨CVE-2025-40776: Cache Poisoning Vulnerability and CVE-2025-40777: Crash Vulnerability
FOFA Query: app="ISC-BIND-DNS"
Results: 15,918
FOFA: https://en.fofa.info/result?qbase64=YXBwPSJJU0MtQklORC1ETlMi
CVSS: 8.6 and 7.5