CVE-2025-40776 — Birthday Attack against Resolvers supporting ECS
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-S…
Published: 2025-07-16 · CVSS: 8.6 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7