If a BIND resolver has cached a tree of SVCB/HTTPS AliasMode records, and is then queried for the root of that tree, the resolver will spend disproportionate CPU time constructing the response. This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.18.11-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade bind9.18-libsUpgrade bind9.18Upgrade bind9.18-utilsUpgrade bind9.18-docUpgrade bind9.18-dnssec-utilsUpgrade bind9.18-chrootUpgrade bind9.18-devel | Oct 13, 2026 | Oct 5, 2026 |
| Alpine Linux | — | Upgrade bind | Sep 28, 2026 | Sep 16, 2026 |
| Amazon_linux_2023 | — | Upgrade bind-utils-debuginfoUpgrade bind-chrootUpgrade bind-docUpgrade bind-libs-debuginfoUpgrade bind-dnssec-utils-debuginfoUpgrade bind-utilsUpgrade bind-dnssec-utilsUpgrade bindUpgrade bind-libsUpgrade bind-develUpgrade bind-debugsourceUpgrade bind-debuginfoUpgrade bind-license | Sep 30, 2026 | Sep 16, 2026 |
| Debian | — | Upgrade bind9 | Sep 21, 2026 | Sep 16, 2026 |
| Freebsd | — | Upgrade bind920 | Oct 5, 2026 | Oct 4, 2026 |
| Oracle_linux | — | Upgrade bind9.18-docUpgrade bind-utilsUpgrade bind9.18-dnssec-utilsUpgrade bind-chrootUpgrade bindUpgrade bind9.18Upgrade bind9.18-chrootUpgrade bind-dnssec-utilsUpgrade bind-develUpgrade bind9.18-utilsUpgrade bind9.18-libsUpgrade bind9.18-develUpgrade bind-licenseUpgrade bind-docUpgrade bind-libs | Oct 22, 2026 | Sep 16, 2026 |
| Redhat_linux | — | Upgrade bind-dnssec-utilsUpgrade bind9.18Upgrade bind9.18-utilsUpgrade bind-libs-debuginfoUpgrade bind-develUpgrade bind-licenseUpgrade bind9.18-develUpgrade bind9.18-dnssec-utils-debuginfoUpgrade bind9.18-debugsourceUpgrade bind9.18-libs-debuginfoUpgrade bind-debuginfoUpgrade bind-dnssec-utils-debuginfoUpgrade bind-docUpgrade bind-libsUpgrade bind-utilsUpgrade bind9.18-dnssec-utilsUpgrade bindUpgrade bind9.18-libsUpgrade bind9.18-chrootUpgrade bind-debugsourceUpgrade bind9.18-debuginfoUpgrade bind9.18-utils-debuginfoUpgrade bind-utils-debuginfoUpgrade bind9.18-docUpgrade bind-chroot | Sep 18, 2026 | Sep 16, 2026 |
| Rocky_linux | — | Upgrade bind9.18-dnssec-utils-debuginfoUpgrade bind9.18-chrootUpgrade bind-utils-debuginfoUpgrade bind9.18-develUpgrade bind-debuginfoUpgrade bind-utilsUpgrade bind9.18-utils-debuginfoUpgrade bind-develUpgrade bind-chrootUpgrade bind9.18-debugsourceUpgrade bind9.18-dnssec-utilsUpgrade bind-dnssec-utilsUpgrade bind9.18-debuginfoUpgrade bind9.18-utilsUpgrade bindUpgrade bind-libsUpgrade bind-dnssec-utils-debuginfoUpgrade bind-debugsourceUpgrade bind9.18-libs-debuginfoUpgrade bind9.18-libsUpgrade bind-libs-debuginfoUpgrade bind9.18 | Oct 7, 2026 | Oct 6, 2026 |
| Ubuntu | — | Upgrade bind9Upgrade bind9 (Ubuntu Pro) | Oct 15, 2026 | Oct 14, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 13, 2026 | Sep 16, 2026 |
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