A use-after-free vulnerability exists within the DNS-over-HTTPS implementation. This issue affects BIND 9 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1. BIND 9 versions 9.18.0 through 9.18.48 and 9.18.11-S1 through 9.18.48-S1 are NOT affected.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade bind | May 25, 2026 | May 20, 2026 |
| Debian | — | Upgrade bind9 | Jul 23, 2026 | Jul 23, 2026 |
| Suse | — | Upgrade bind-modules-ldapUpgrade bind-docUpgrade bind-modules-bdbhptUpgrade bind-modules-perlUpgrade bind-utilsUpgrade bindUpgrade bind-modules-mysqlUpgrade bind-modules-genericUpgrade bind-modules-sqlite3 | Jun 24, 2026 | Jun 24, 2026 |
| Ubuntu | — | Upgrade bind9 | May 25, 2026 | May 21, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jun 17, 2026 | May 20, 2026 |
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