BIND 9.7.3-P1 is security patch for BIND 9.7.3.

Please see the CHANGES file in the source code release for a complete list of all changes.


The latest versions of BIND 9 software can always be found on our web site at There you will find additional information about each release, source code, and some pre-compiled versions for certain operating systems.


Product support information is available on for paid support options. Free support is provided by our user community via a mailing list. Information on all public email lists is available at

Security Fixes


  • A large RRSET from a remote authoritative server that results in the recursive resolver trying to negatively cache the response can hit an off by one code error in named, resulting in named crashing. [RT #24650] [CVE-2011-1910]
  • Zones that have a DS record in the parent zone but are also listed in a DLV and won't validate without DLV could fail to validate. [RT #24631]

Thank You

Thank you to everyone who assisted us in making this release possible. If you would like to contribute to ISC to assist us in continuing to make quality open source software, please visit our donations page at