Skip to content
Sign in
8.6 High

CVE-2025-40776 A `named` caching resolver that is configured to send ECS (EDNS Client Subnet) options may be vulnerable to a…

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.

Affected products and versions

Product Affected versions Fixed in
BIND 9 9.20 9.20.9-S1 → 9.20.10-S1 No fix stated
BIND 9 9.18 9.18.11-S1 → 9.18.37-S1 No fix stated
BIND 9 9.11 9.11.3-S1 → 9.16.50-S1 No fix stated
BIND 9 9.0 earliest → < 9.0.0 9.0.0

Other CVEs of BIND 9

The 87 CVEs of BIND 9 →
CVE-2026-97313 A recursive BIND server that receives a query with recursion desired (RD=1) followed by a non-recursive query (RD=0) may… 7.5 High CVE-2026-96888 A BIND resolver that is configured with both a "redirect" zone and "qname-minimization strict" may abort with an… 7.5 High CVE-2026-94300 Replaying GSS-TSIG signed UDP messages can result in memory corruption in "`named`" 8.1 High CVE-2026-19630 In a BIND resolver, inbound DNS protocol messages with a particular structure will result in additional processing, with… 7.5 High
Track this CVE