CVE-2025-47711

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

Description

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.

Category

4.3
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.04%
Affected: Red Hat Red Hat Enterprise Linux 10
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 8 Advanced Virtualization
Affected: Red Hat Red Hat Enterprise Linux 8 Advanced Virtualization
Affected: Red Hat Red Hat Enterprise Linux 9
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/security/cve/CVE-2025-47711 vdb entry
https://bugzilla.redhat.com/show_bug.cgi?id=2365687 issue tracking

Frequently Asked Questions

What is the severity of CVE-2025-47711?
CVE-2025-47711 has been scored as a medium severity vulnerability.
How to fix CVE-2025-47711?
To fix CVE-2025-47711, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-47711 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-47711 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-47711?
CVE-2025-47711 affects Red Hat Red Hat Enterprise Linux 10, Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 8 Advanced Virtualization, Red Hat Red Hat Enterprise Linux 8 Advanced Virtualization, Red Hat Red Hat Enterprise Linux 9.
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