CVE-2025-47711 MEDIUM

CVE-2025-47711: Nbdkit: nbdkit-server: off-by-one error when processing block status may lead to a denial of service

Vendor Red Hat
Product Red Hat Enterprise Linux 10
Weakness CWE-193
Published June 9, 2025
Last update January 8, 2026

CVSS base score

6.5/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

There's a flaw in the nbdkit server when handling responses from its plugins regarding the status of data blocks. If a client makes a specific request for a very large data range, and a plugin responds with an even larger single block, the nbdkit server can encounter a critical internal error, leading to a denial-of-service.

Key dates

02Disclosure timeline

June 9, 2025 CVE published
January 8, 2026 Record updated