Knowledge Base ISC Main Website Ask a Question/Contact ISC
BIND 9.7.6-P3 Release Notes
Author: ISC Support Reference Number: AA-00790 Views: 5580 Created: 2012-09-11 23:57 Last Updated: 2012-09-11 23:59 0 Rating/ Voters


BIND 9.7.6-P3 is the latest production release of BIND 9.7.

This document summarizes changes from BIND 9.7.5 to BIND 9.7.6-P3.  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 pre-compiled versions for Microsoft Windows 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
  • Prevents a named assert (crash) when queried for a record whose RDATA exceeds 65535 bytes.  [RT #30416]
  • Prevents a named assert (crash) when validating caused by using "Bad cache" data before it has been initialized.  [RT #30025]
  • A condition has been corrected where improper handling of zero-length RDATA could cause undesirable behavior, including termination of the named process.  [RT #29644]
New Features


Feature Changes
  • BIND now recognizes the TLSA resource record type, created to support IETF DANE (DNS-based Authentication of Named Entities) [RT #28989]
Bug Fixes
  • Fixes the defect introduced by change #3314 that was causing failures when saving stub zones to disk (resulting in excessive CPU usage in some cases).  [RT #29952]
  • The locking strategy around the handling of iterative queries has been tuned to reduce unnecessary contention in a multi-threaded environment.  (Note that this may not provide a measurable improvement over previous versions of BIND, but it corrects the performance impact of change 3309 / RT #27995) [RT #29239]
  • Addresses a race condition that can cause named to to crash when the masters list for a zone is updated via rndc reload/reconfig [RT #26732]
  • Fixes a race condition in zone.c that can cause named to crash during the processing of rndc delzone [RT #29028]
  • Prevents a named segfault from resolver.c due to procedure fctx_finddone() not being thread-safe.  [RT #27995]
  • Uses hmctx, not mctx when freeing rbtdb->heaps to avoid triggering an assertion when flushing cache data. [RT #28571]
  • Resolves inconsistencies in locating DNSSEC keys where zone names contain characters that require special mappings [RT #28600]
  • A new flag -R  has been added to queryperf for running tests using non-recursive queries.  It also now builds correctly on MacOS version 10.7 (darwin)  [RT #28565]
  • Named no longer crashes if gssapi is enabled in named.conf but was not compiled into the binary [RT #28338]
  • SDB now handles unexpected errors from back-end database drivers gracefully instead of exiting on an assert. [RT #28534] 
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

© 2001-2018 Internet Systems Consortium

For assistance with problems and questions for which you have not been able to find an answer in our Knowledge Base, we recommend searching our community mailing list archives and/or posting your question there (you will need to register there first for your posts to be accepted). The bind-users and the dhcp-users lists particularly have a long-standing and active membership.

ISC relies on the financial support of the community to fund the development of its open source software products. If you would like to support future product evolution and maintenance as well having peace of mind knowing that our team of experts are poised to provide you with individual technical assistance whenever you call upon them, then please consider our Professional Subscription Support services - details can be found on our main website.

  • There is no feedback for this article
Quick Jump Menu