Off-by-one in nbdkit - CVE-2025-47711
Published: July 14, 2025
Vulnerability identifier: #VU112886
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-47711
CWE-ID: CWE-193
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: libguestfs
Affected software:
nbdkit
nbdkit
Detailed vulnerability description
The vulnerability allows a remote user to perform a denial of service attack.
The vulnerability exists due to an off-by-one error handling responses from its plugins regarding the status of data blocks. A remote client can request for a very large data range to trigger an off-by-one error and crash the server.
How to mitigate CVE-2025-47711
Install updates from vendor's website.