CVE-2025-47712
Fixed in a distro release EPSS <1%CVSS 6.5
A flaw exists in the nbdkit "blocksize" filter that can be triggered by a specific type of client request. When a client requests block status information for a very large data range, exceeding a certain limit, it causes an internal error in the nbdkit, leading to a denial of service.
Products: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8 Advanced Virtualization, Red Hat Enterprise Linux 9
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | nbdkit | no fix |
| Debian 13 | nbdkit | 1.42.3-1 |
| Debian 14 | nbdkit | 1.42.3-1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP6 | nbdkit | 1.36.5-150400.3.9.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP7 | nbdkit | 1.40.6-150700.4.3.1 |
| Ubuntu 16.04 LTS | nbdkit | no fix |
| Ubuntu 20.04 LTS | nbdkit | no fix |
| Ubuntu 22.04 LTS | nbdkit | no fix |
| Ubuntu 24.04 LTS | nbdkit | no fix |
| Ubuntu 25.10 | nbdkit | no fix |
| Ubuntu 26.04 LTS | nbdkit | no fix |
| Ubuntu 26.10 | nbdkit | no fix |
| openSUSE Leap 15.6 | nbdkit | 1.36.5-150400.3.9.1 |
| openSUSE Tumbleweed | nbdkit | 1.42.3-1.1 |