CVE-2025-40776
published 2025-07-16CVE-2025-40776: 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…
high8.6CVSS 3.1
AVNACLPRNUINSCCNIHAN
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
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | bind9 | — | — |
| isc | bind | >= 0 < 9.20.11-r0 | 9.20.11-r0 |
| isc | bind | >= 0 < 9.20.11-r0 | 9.20.11-r0 |
| isc | bind_9 | 9.11.3-S1 – 9.16.50-S1 | — |
| isc | bind_9 | 9.18.11-S1 – 9.18.37-S1 | — |
| isc | bind_9 | 9.20.9-S1 – 9.20.10-S1 | — |
CVSS provenance
nvdv3.18.6HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
osv8.6HIGH