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In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, a single client query for a deeply nested name under a DNSSEC-signed parent can cause Unbound to send more upstream packets per client query than the configured 'max-global-quota'. This effectively bypasses a security configuration that limits upstream amplification traffic.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade unbound | Jul 29, 2026 | Jul 22, 2026 |
| Debian | — | Upgrade unbound | Sep 21, 2026 | Jul 22, 2026 |
| Freebsd | — | Upgrade unbound | Jul 28, 2026 | Jul 25, 2026 |
| Redhat_linux | — | No solution exists | Aug 12, 2026 | Jul 22, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Aug 10, 2026 | Jul 22, 2026 |
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