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Fedora 43: libnbd Important NBD+SSH Security Fix FEDORA-2025

Linuxsecurity •LinuxSecurity Advisories • November 5, 2025

NBD \u2014 Network Block Device \u2014 is a protocol for accessing Block Devices (hard disks and disk-like things) over a Network. This is the NBD client library in userspace, a simple library for writing NBD clients. The key features are: * Synchronous and asynchronous APIs, both for ease of use and for writing non-blocking, multithreaded clients. * High performance. * Minimal dependencies for the basic library. * Well-documented, stable API. * Bindings in several programming languages. Update Information : New upstream development version 1.23.10 New upstream development version 1.23.9

NBD \u2014 Network Block Device \u2014 is a protocol for accessing Block Devices

(hard disks and disk-like things) over a Network.

This is the NBD client library in userspace, a simple library for

The key features are:

* Synchronous and asynchronous APIs, both for ease of use and for

writing non-blocking, multithreaded clients.

* Minimal dependencies for the basic library.

* Well-documented, stable API.

* Bindings in several programming languages.

New upstream development version 1.23.10 New upstream development version 1.23.9

* Sun Nov 2 2025 Richard W.M. Jones - 1.23.10-1 - New upstream development version 1.23.10 - New tools nbddiscard and nbdzero. * Thu Oct 23 2025 Richard W.M. Jones - 1.23.9-1 - New upstream development version 1.23.9 - Fixes security issue with nbd+ssh URIs

Fedora Update Notification FEDORA-2025-d44581756d 2025-11-05 02:09:57.817682+00:00 Name : libnbd Product : Fedora 43 Version : 1.23.10 Release : 1.fc43 URL : Summary : NBD client library in userspace Description : NBD \u2014 Network Block Device \u2014 is a protocol for accessing Block Devices (hard disks and disk-like things) over a Network. This is the NBD client library in userspace, a simple library for writing NBD clients. The key features are: * Synchronous and asynchronous APIs, both for ease of use and for writing non-blocking, multithreaded clients. * High performance. * Minimal dependencies for the basic library. * Well-documented, stable API. * Bindings in several programming languages.

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2025-d44581756d' at the command line. For more information, refer to the dnf documentation available at

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Fedora Releases Security Fixes for libnbd in Multiple Versions Fedora has issued important security updates for the libnbd library across several versions, including Fedora 41, 42, and 43. These updates address critical performance and security vulnerabilities in the Network Block Device (NBD) client library, which is essential for accessing block devices over a network. Users of affected Fedora versions are advised to apply the updates to mitigate potential risks. 3 sources 32

Extracted Entities

Tools (2)

nbddiscard nbdzero