Dear all,
We have an emergency quick-fix release, version 4.11.1 for NSD.
NSD 4.11.1 is available:
https://nlnetlabs.nl/downloads/nsd/nsd-4.11.1.tar.gz
sha256 696e50052008de4fa7ab1d818d5b77eb63247eea2f0575114c9592ff9188a614
pgp https://nlnetlabs.nl/downloads/nsd/nsd-4.11.1.tar.gz.asc
NSD version 4.11.0 had a serious bug in which applying updates to zones (and other modifications that require a reload, such as adding and deleting zones), could stop entirely after reception of a broken or corrupted update via zone transfer. We believe that this broken state would appear as one of the NSD processes consuming 100% CPU. Version 4.11.1 has this corrected as well as some other smaller non-critical bugs.
We strongly advise to not run NSD version 4.11.0, and if you have it deployed already, upgrade to 4.11.1 at the earliest possible opportunity.
nsd 4.11.1