CVE-2025-47711: Off-by-one Error
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.
AI Analysis
Technical Summary
The nbdkit server has a flaw in handling plugin responses about data block status. Specifically, if a client requests a very large data range and the plugin responds with a larger single block, an off-by-one error triggers a critical internal error in the server, resulting in denial-of-service. This affects Red Hat Enterprise Linux 10 versions 1.11.10, 1.40.0, and 1.42.0. The vulnerability has a CVSS 3.1 score of 6.5 (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H), reflecting network attack vector, low attack complexity, requiring low privileges, no user interaction, unchanged scope, no confidentiality or integrity impact, but high availability impact. The vendor advisory does not explicitly confirm patch availability or mitigation steps.
Potential Impact
Successful exploitation causes a denial-of-service condition in the nbdkit server due to a critical internal error triggered by malformed plugin responses. There is no impact on confidentiality or integrity. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2025-47711 for current remediation guidance. Until an official fix is available, consider limiting access to the nbdkit service to trusted clients to reduce exposure. Monitor vendor communications for updates on patches or workarounds.
CVE-2025-47711: Off-by-one Error
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.
CVSS v3.1
Score 6.5medium
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The nbdkit server has a flaw in handling plugin responses about data block status. Specifically, if a client requests a very large data range and the plugin responds with a larger single block, an off-by-one error triggers a critical internal error in the server, resulting in denial-of-service. This affects Red Hat Enterprise Linux 10 versions 1.11.10, 1.40.0, and 1.42.0. The vulnerability has a CVSS 3.1 score of 6.5 (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H), reflecting network attack vector, low attack complexity, requiring low privileges, no user interaction, unchanged scope, no confidentiality or integrity impact, but high availability impact. The vendor advisory does not explicitly confirm patch availability or mitigation steps.
Potential Impact
Successful exploitation causes a denial-of-service condition in the nbdkit server due to a critical internal error triggered by malformed plugin responses. There is no impact on confidentiality or integrity. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2025-47711 for current remediation guidance. Until an official fix is available, consider limiting access to the nbdkit service to trusted clients to reduce exposure. Monitor vendor communications for updates on patches or workarounds.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- redhat
- Date Reserved
- 2025-05-07T21:08:45.449Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2025-47711","vendor":"Red Hat"}]
Threat ID: 6846c60d7b622a9fdf1e7923
Added to database: 06/09/2025, 11:31:25 UTC
Last enriched: 07/02/2026, 22:03:11 UTC
Last updated: 09/10/2026, 19:36:50 UTC
Views: 109
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