When an incoming DNS protocol message includes a Transaction Signature (TSIG), BIND always checks it. If the TSIG contains an invalid value in the algorithm field, BIND immediately aborts with an assertion failure. This issue affects BIND 9 versions 9.20.0 through 9.20.8 and 9.21.0 through 9.21.7.
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 |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade bind | Aug 8, 2025 | May 21, 2025 |
| Arch Linux | arch-linux-upgrade-latest | Jul 11, 2025 | May 21, 2025 | |
| Debian | — | Upgrade bind9No solution exists | Jun 23, 2025 | May 21, 2025 |
| Dns Bind | upgrade-isc-bind-latest | Feb 20, 2026 | Feb 20, 2026 | |
| Suse | — | suse-upgrade-bindsuse-upgrade-bind-docsuse-upgrade-bind-modules-genericsuse-upgrade-bind-modules-ldapsuse-upgrade-bind-modules-mysqlsuse-upgrade-bind-modules-perlsuse-upgrade-bind-modules-sqlite3suse-upgrade-bind-utils | Dec 5, 2025 | May 30, 2025 |
| Ubuntu | ubuntu-upgrade-bind9 | May 22, 2025 | May 21, 2025 | |
| Vmware Photon_os | vmware-photon_os_update_tdnf | Jul 2, 2025 | May 21, 2025 |
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