nbdkit-release-notes-1.48 - release notes for nbdkit 1.48
These are the release notes for nbdkit stable release 1.48. This describes the major changes since 1.44.
nbdkit 1.48.0 was released on XXX July 2026.
Fix minor denial of service vulnerability in nbdkit-blocksize-policy-filter(1) (Eric Blake).
Fix a minor issue with concurrent connections in nbdkit-golang-plugin(3) (AISLE AI security scanner).
In nbdkit-file-plugin(1) we no longer advertize minimum_io_size larger than 64K even for backing storage like LVM that could support it. This is because the NBD protocol itself does not support larger sizes (thanks Nijin Ashok, Eric Blake, Mikulas Patocka).
In nbdkit-sparse-random-plugin(1) the block size is now configurable at run time.
In nbdkit-vddk-plugin(1) test against VDDK 9.0.1.0.
New nbdkit-xor-filter(1) simply XORs a pattern or PRNG with the underlying data, providing simple obfuscation.
nbdkit-cow-filter(1) now supports arbitrarily large overlays, even when the filesystem used to store the overlay has file size limitations (eg. 16T on ext4)
nbdkit-ip-filter(1) now allows you to filter on loopback addresses.
In nbdkit-ocaml-plugin(3) a new NBDKit.Error exception can be used to throw a precise errno with error message. Also Unix_error exception is now translated to errno and error, and there are other improvements to Failure and Invalid_argument exceptions.
In nbdkit-ocaml-plugin provide convenience functions for converting bytes and string types into NBDKit.buf
nbdkit --port=0 can be used to let the kernel pick a free listening port.
LISTEN_FDNAMES is now parsed for socket activation, although we do nothing aside from printing socket names.
New nbdkit_debug_hexdiff(3) function which shows the differences between two binary buffers.
New nbdkit_name(3) function which returns the nbdkit --name parameter to plugins and filters.
New nbdkit_timestamp(3) function which returns a timestamp suitable for log messages.
When parsing human sizes (eg. in nbdkit_parse_size(3)), allow hex and octal sizes, and allow _ before the scaling factor. For example 0x1_E is parsed as 1 exabyte.
nbdkit_read_password(3) password=- now reads the password from /dev/tty on operating systems that support this.
Document how to disable shadow stack support for loading plugins that were not compiled with this feature.
A new interoperability test with Digital Ocean's Go-NBD client library was added.
Fix CI (Daniel Berrangé).
Setting NBDKIT_VALGRIND_MASSIF=1 will run nbdkit under valgrind massif (for memory profiling).
Authors of nbdkit 1.48:
Copyright Red Hat
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
Neither the name of Red Hat nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.