An attacker can send a crafted EDNS OPT record that will be ignored by DNSdist’s filtering rules, but will be rewritten as a valid OPT record when EDNS Client Subnet is inserted, causing the backend to see the EDNS option(s) that DNSdist did not filter.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade dnsdist | Jul 23, 2026 | Jul 23, 2026 |
| Freebsd | — | Upgrade dnsdist | Jun 30, 2026 | Jun 29, 2026 |
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