BIND resolvers are vulnerable to an amplified resource consumption/exhaustion attack. If a victim resolver makes a query to a specially crafted zone, the resolver will consume disproportionate resources. This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.48, 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.
| Vendor | Product | Versions |
|---|---|---|
| isc | bind | 9.11.0, 9.18.0, 9.20.0, 9.21.0, 9.11.3-S1, 9.18.11-S1, 9.20.9-S1 |
Downstream vendors/products affected by this vulnerability
| Vendor | Product | Source | Confidence |
|---|---|---|---|
| internet systems consortium | bind | cert_advisory | 90% |
Added new CVE IDs CVE-2026-3039 and CVE-2026-3593, and updated exploit availability to true.
Updated description with new technical details, marked exploit availability as false, and noted no patch available.
Initial creation
