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THREATINT
PUBLISHED

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.

Reserved 2025-05-07 | Published 2025-06-09 | Updated 2025-06-09 | Assigner redhat


MEDIUM: 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Problem types

Off-by-one Error

Product status

Default status
affected

Default status
unknown

Default status
unknown

Default status
unknown

Default status
unknown

Default status
affected

Timeline

2025-05-12:Reported to Red Hat.
2025-04-23:Made public.

References

access.redhat.com/security/cve/CVE-2025-47711 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2365687 (RHBZ#2365687) issue-tracking

cve.org (CVE-2025-47711)

nvd.nist.gov (CVE-2025-47711)

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