Vulnerability in Nbdkit Project
CVE-2025-47711
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (37.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.000
Affected products
- Nbdkit Project
- 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
- Red Hat In-Vehicle Operating System 1
- Red Hat Enterprise Linux — versions 7.0, 8.0, 9.0
- Red Hat Enterprise Linux Advanced Virtualization — versions 8.0
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2025-47711 (vdb-entry, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Issue Tracking)
- lists.libguestfs.org/archives/list/guestfs@lists.libguestfs.org/thread/67E7AASH…
Frequently asked questions
- What is CVE-2025-47711?
- CVE-2025-47711 is a medium-severity vulnerability in Nbdkit Project, classified under Off-by-one Error. CVSS score: 6.5/10. Published 2025-06-09.
- How severe is CVE-2025-47711?
- Medium severity. CVSS v3 base score is 6.5 out of 10.