Nbd: nbdkit: integer overflow triggers an assertion resulting in denial of service
CVE-2025-47712 is fixed in nbdkit on 1 platform, first by DEBIAN-CVE-2025-47712, released June 9, 2025. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| nbdkit · Debian 13.5 (trixie) | 1.42.3-1 | DEBIAN-CVE-2025-47712 | Jun 9, 2025 |
| nbdkit · Debian 14 | 1.42.3-1 | DEBIAN-CVE-2025-47712 | Jun 9, 2025 |
| nbdkit · opensuse-leap 15.6 | 1.36.5-150400.3.9.1 | SUSE-SU-2025:01889-1 | Jun 11, 2025 |
| nbdkit · sles 15.6 | 1.36.5-150400.3.9.1 | SUSE-SU-2025:01889-1 | Jun 11, 2025 |
| nbdkit · sles 15.7 | 1.40.6-150700.4.3.1 | SUSE-SU-2025:01888-1 | Jun 11, 2025 |
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