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CVE-2025-47712

Nbd: nbdkit: integer overflow triggers an assertion resulting in denial of service

Published: Jun 9, 2025Updated: Jun 30, 2026 Sources: CVE List NVD BDUCWE-190
6.5MEDIUM
NVD MITRE
EPSS Score
0.4%
Top 66.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-190

Affected Products

Red Hat
commercial·US
Red Hat Enterprise Linux 10On-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 8 Advanced VirtualizationOn-premOS
Operating Systems / linux-distro
ООО «РусБИТех-Астра»
commercial·RUaka rusbitech-astra
Astra Linux Special EditionOn-premOS
Operating Systems / linux-distro
ООО «Ред Софт»
commercial·RUaka red soft
РЕД ОСOn-premOS
Operating Systems / linux-distro
Fedora Project
oss-project·USaka fedora
NBDKit Plugin FrameworkOn-prem
Operating Systems / linux-distro
nbdkit project
oss-project
nbdkitLibrary
OSS Libraries / generic-library
and 4 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2025-47712?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Initial Access
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References

https://access.redhat.com/security/cve/CVE-2025-47712
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2365724
bugzilla.redhat.com
https://gitlab.com/nbdkit/nbdkit/-/commit/a486f88d1eea653ea88b0bf8804c4825dab25ec7
gitlab.com
and 9 more references View all →

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