New BIND 9 releases: 9.20.27, 9.21.25

[Suzanne Goldlust]

Our August 2026 maintenance releases of BIND 9 are available and can be downloaded from the links below. Packages and container images provided by ISC will be updated later today.

A link to each newly-released version follows. Each release directory includes a complete source tarball, cryptographic signature, and release notes. The release notes provide a summary of significant changes, and should be reviewed before upgrading.

- Current supported stable branch:

- 9.20.27 - https://downloads.isc.org/isc/bind9/9.20.27/

- Experimental development branch:

- 9.21.25 - https://downloads.isc.org/isc/bind9/9.21.25/

For more information and other release formats, consult the ISC software download page: https://www.isc.org/download/

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As a reminder, BIND’s supported platforms are listed in the ARM (https://bind9.readthedocs.io/en/stable/chapter2.html#supported-platforms) and in this knowledgebase article (https://kb.isc.org/docs/supported-platforms).

Thank you for using ISC’s software.