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CVE-2025-47712

21
FAUCET Score

CVE-2025-47712 is a denial-of-service vulnerability in the nbdkit "blocksize" filter, affecting nbdkit_project and Red Hat Enterprise Linux products. A remote, low-privileged attacker can trigger an internal error by requesting block status for an excessively large data range. This medium-severity flaw (CVSS 6.5) has no known active exploitation, public exploit code, or significant community discussion, indicating a low current threat.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:nbdkit_project:nbdkit:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.39%
Probability of exploitation in next 30 days
EPSS Percentile
31.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0039 is in the 41st percentile among its peer group of 21,957 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

microsoftpatch availablevia msrc
Product: azl3 nbdkit 1.35.3-7 on Azure Linux 3.0Fixed in: 1.35.3-7
microsoftpatch availablevia msrc
Product: cm2 nbdkit 1.35.3-4 on CBL Mariner 2.0Fixed in: 1.35.3-4
microsoftpatch availablevia msrc
Product: cbl2 nbdkit 1.35.3-4 on CBL Mariner 2.0Fixed in: 1.35.3-4
microsoftpatch availablevia msrc
Product: 19563-16823Fixed in: 1.35.3-4
microsoftpatch availablevia msrc
Product: 20266-17086Fixed in: 1.35.3-4
microsoftpatch availablevia msrc
Product: 19610-17084Fixed in: 1.35.3-7
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: nbdkit
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 10Fixed in: nbdkit

Vendor Advisories (2)

microsoft2025-Jun/CVE-2025-47712Moderate

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

Jun 10, 2025
redhatCVE-2025-47712Moderate

nbd: nbdkit: Integer overflow triggers an assertion resulting in Denial of Service

Apr 23, 2025

References

access.redhat.com / security/cve/CVE-2025-47712
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
lists.libguestfs.org / archives/list/[email protected]/thread/67E7AASHHADIY7VAD3FFW2I67LTWVWYF
Third Party Advisory