CVE-2025-47711
published 2025-06-09CVE-2025-47711: 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…
PriorityP335medium6.5CVSS 3.1
AVNACLPRLUINSUCNINAH
EPSS
0.38%
30.5th percentile
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.
Affected
11 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | nbdkit | < nbdkit 1.42.3-1 (forky) | nbdkit 1.42.3-1 (forky) |
| msrc | azl3_nbdkit_1.35.3-7_on_azure_linux_3.0 | — | — |
| msrc | cbl2_nbdkit_1.35.3-4_on_cbl_mariner_2.0 | — | — |
| msrc | cm2_nbdkit_1.35.3-4_on_cbl_mariner_2.0 | — | — |
| nbdkit_project | nbdkit | >= 0 < 1.42.3-1 | 1.42.3-1 |
| nbdkit_project | nbdkit | >= 0 < 1.42.3-1 | 1.42.3-1 |
| redhat | enterprise_linux | — | — |
| redhat | enterprise_linux | — | — |
| redhat | enterprise_linux | — | — |
| redhat | enterprise_linux | — | — |
| redhat | enterprise_linux_advanced_virtualization | — | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv6.5MEDIUM
vendor_debian6.5MEDIUM
vendor_redhat6.5MEDIUM
vendor_msrc4.3MEDIUM
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Microsoft
Nbdkit: nbdkit-server: off-by-one error when processing block status may lead to a denial of service
vendor_msrc·2025-06-10·CVSS 4.3
CVE-2025-47711 [MEDIUM] CWE-193 Nbdkit: nbdkit-server: off-by-one error when processing block status may lead to a denial of service
Nbdkit: nbdkit-server: off-by-one error when processing block status may lead to a denial of service
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
redhat: redhat
Customer Action Required: Yes
Remediation:
Red Hat
nbdkit: nbdkit-server: off-by-one error when processing block status may lead to a Denial of Service
vendor_redhat·2025-04-23·CVSS 6.5
CVE-2025-47711 [MEDIUM] CWE-193 nbdkit: nbdkit-server: off-by-one error when processing block status may lead to a Denial of Service
nbdkit: nbdkit-server: off-by-one error when processing block status may lead to a Denial of Service
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.
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.
Statement: This vulnerability was rated as
Debian
CVE-2025-47711: nbdkit - There's a flaw in the nbdkit server when handling responses from its plugins reg...
vendor_debian·2025·CVSS 6.5
CVE-2025-47711 [MEDIUM] CVE-2025-47711: nbdkit - There's a flaw in the nbdkit server when handling responses from its plugins reg...
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.
Scope: local
bookworm: open
bullseye: open
forky: resolved (fixed in 1.42.3-1)
sid: resolved (fixed in 1.42.3-1)
trixie: resolved (fixed in 1.42.3-1)
OSV
CVE-2025-47711: There's a flaw in the nbdkit server when handling responses from its plugins regarding the status of data blocks
osv·2025-06-09·CVSS 6.5
CVE-2025-47711 [MEDIUM] CVE-2025-47711: There's a flaw in the nbdkit server when handling responses from its plugins regarding the status of data blocks
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.
GHSA
GHSA-c8xj-fr2w-pjfc: There's a flaw in the nbdkit server when handling responses from its plugins regarding the status of data blocks
ghsa_unreviewed·2025-06-09
CVE-2025-47711 [MEDIUM] CWE-193 GHSA-c8xj-fr2w-pjfc: There's a flaw in the nbdkit server when handling responses from its plugins regarding the status of data blocks
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.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2025-06-09
Published