Vulnerability-Lookup

OESA-2025-1778 (CVE-2025-47711)

Vulnerability from osv_openeuler – Published: 2025-07-11 11:08 – Updated: 2026-08-06 11:08 – Source website

Summary

nbdkit security update

Details

NBD (Network Block Device) is a protocol for accessing Block Devices (hard disks and disk-like things) over a Network. nbdkit is a toolkit for creating NBD servers. The key features are: * Multithreaded NBD server written in C with good performance. * Minimal dependencies for the basic server. * Liberal license (BSD) allows nbdkit to be linked to proprietary libraries or included in proprietary code. * Well-documented, simple plugin API with a stable ABI guarantee. Lets you export “unconventional” block devices easily. * You can write plugins in C, Lua, Perl, Python, OCaml, Ruby, Rust, shell script or Tcl. * Filters can be stacked in front of plugins to transform the output.

Security Fix(es):

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.(CVE-2025-47711)

A flaw exists in the nbdkit "blocksize" filter that can be triggered by a specific type of client request. When a client requests block status information for a very large data range, exceeding a certain limit, it causes an internal error in the nbdkit, leading to a denial of service.(CVE-2025-47712)

Severity

4.3 (Medium)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-47711	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-47712	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "nbdkit-1.29.11-2.oe2203sp4.aarch64.rpm",
          "nbdkit-basic-filters-1.29.11-2.oe2203sp4.aarch64.rpm",
          "nbdkit-basic-plugins-1.29.11-2.oe2203sp4.aarch64.rpm",
          "nbdkit-debuginfo-1.29.11-2.oe2203sp4.aarch64.rpm",
          "nbdkit-debugsource-1.29.11-2.oe2203sp4.aarch64.rpm",
          "nbdkit-devel-1.29.11-2.oe2203sp4.aarch64.rpm",
          "nbdkit-guestfs-plugin-1.29.11-2.oe2203sp4.aarch64.rpm",
          "nbdkit-libvirt-plugin-1.29.11-2.oe2203sp4.aarch64.rpm",
          "nbdkit-ocaml-plugin-1.29.11-2.oe2203sp4.aarch64.rpm",
          "nbdkit-ocaml-plugin-devel-1.29.11-2.oe2203sp4.aarch64.rpm",
          "nbdkit-perl-plugin-1.29.11-2.oe2203sp4.aarch64.rpm",
          "nbdkit-plugins-1.29.11-2.oe2203sp4.aarch64.rpm",
          "nbdkit-python3-plugin-1.29.11-2.oe2203sp4.aarch64.rpm",
          "nbdkit-server-1.29.11-2.oe2203sp4.aarch64.rpm"
        ],
        "noarch": [
          "nbdkit-bash-completion-1.29.11-2.oe2203sp4.noarch.rpm",
          "nbdkit-help-1.29.11-2.oe2203sp4.noarch.rpm"
        ],
        "src": [
          "nbdkit-1.29.11-2.oe2203sp4.src.rpm"
        ],
        "x86_64": [
          "nbdkit-1.29.11-2.oe2203sp4.x86_64.rpm",
          "nbdkit-basic-filters-1.29.11-2.oe2203sp4.x86_64.rpm",
          "nbdkit-basic-plugins-1.29.11-2.oe2203sp4.x86_64.rpm",
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          "nbdkit-ocaml-plugin-1.29.11-2.oe2203sp4.x86_64.rpm",
          "nbdkit-ocaml-plugin-devel-1.29.11-2.oe2203sp4.x86_64.rpm",
          "nbdkit-perl-plugin-1.29.11-2.oe2203sp4.x86_64.rpm",
          "nbdkit-plugins-1.29.11-2.oe2203sp4.x86_64.rpm",
          "nbdkit-python3-plugin-1.29.11-2.oe2203sp4.x86_64.rpm",
          "nbdkit-server-1.29.11-2.oe2203sp4.x86_64.rpm",
          "nbdkit-vddk-plugin-1.29.11-2.oe2203sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP4",
        "name": "nbdkit",
        "purl": "pkg:rpm/openEuler/nbdkit\u0026distro=openEuler-22.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.29.11-2.oe2203sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "NBD (Network Block Device) is a protocol for accessing Block Devices (hard disks and disk-like things) over a Network. nbdkit is a toolkit for creating NBD servers. The key features are:  * Multithreaded NBD server written in C with good performance.  * Minimal dependencies for the basic server.  * Liberal license (BSD) allows nbdkit to be linked to proprietary libraries or included in proprietary code.  * Well-documented, simple plugin API with a stable ABI guarantee. Lets you export \u201cunconventional\u201d    block devices easily.  * You can write plugins in C, Lua, Perl, Python, OCaml, Ruby, Rust, shell script or Tcl.  * Filters can be stacked in front of plugins to transform the output.\r\n\r\nSecurity Fix(es):\n\nThere\u0026apos;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.(CVE-2025-47711)\n\nA flaw exists in the nbdkit \u0026quot;blocksize\u0026quot; filter that can be triggered by a specific type of client request. When a client requests block status information for a very large data range, exceeding a certain limit, it causes an internal error in the nbdkit, leading to a denial of service.(CVE-2025-47712)",
  "id": "OESA-2025-1778",
  "modified": "2026-08-06T11:08:51Z",
  "published": "2025-07-11T11:08:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1778"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-47711"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-47712"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "nbdkit security update",
  "upstream": [
    "CVE-2025-47711",
    "CVE-2025-47712"
  ]
}

CVE-2025-47711 (GCVE-0-2025-47711)

Vulnerability from cvelistv5 – Published: 2025-06-09 06:03 – Updated: 2026-11-05 15:49

Title

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

Summary

Severity

6.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-06-09 18:19 UTC

CWE

CWE-193 - Off-by-one Error

Assigner

redhat CNA under the redhat root

CNA scorecard B 82/100 over 1131 records in the last 180 days details

References

3 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2025-47711	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2365687	issue-trackingx_refsource_REDHAT
https://lists.libguestfs.org/archives/list/guestf…

Impacted products

6 products

Vendor	Product	Version
		Affected: 1.11.10 , < 1.38.6 (semver) Affected: 1.40.0 , < 1.40.6 (semver) Affected: 1.42.0 , < 1.42.3 (semver)
Red Hat	Red Hat Enterprise Linux 10	cpe:/a:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:rhel_els:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/a:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 8 Advanced Virtualization	cpe:/a:redhat:advanced_virtualization:8::el8
Red Hat	Red Hat Enterprise Linux 9	cpe:/a:redhat:enterprise_linux:9

Date Public

2025-04-23 00:00

Show details on NVD website

JSON

To clipboard

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CVE-2025-47712 (GCVE-0-2025-47712)

Vulnerability from cvelistv5 – Published: 2025-06-09 05:58 – Updated: 2026-11-05 15:49

Title

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

Summary

Severity

6.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-06-09 18:23 UTC

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

redhat CNA under the redhat root

CNA scorecard B 82/100 over 1131 records in the last 180 days details

References

3 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2025-47712	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2365724	issue-trackingx_refsource_REDHAT
https://lists.libguestfs.org/archives/list/guestf…

Impacted products

6 products

Vendor	Product	Version
		Affected: 1.21.16 , < 1.38.6 (semver) Affected: 1.40.0 , < 1.40.6 (semver) Affected: 1.42.0 , < 1.42.3 (semver)
Red Hat	Red Hat Enterprise Linux 10	cpe:/a:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:rhel_els:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/a:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 8 Advanced Virtualization	cpe:/a:redhat:advanced_virtualization:8::el8
Red Hat	Red Hat Enterprise Linux 9	cpe:/a:redhat:enterprise_linux:9

Date Public

2025-04-23 00:00

Show details on NVD website

JSON

To clipboard

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            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/security/cve/CVE-2025-47712"
        },
        {
          "name": "RHBZ#2365724",
          "tags": [
            "issue-tracking",
            "x_refsource_REDHAT"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2365724"
        },
        {
          "url": "https://lists.libguestfs.org/archives/list/guestfs@lists.libguestfs.org/thread/67E7AASHHADIY7VAD3FFW2I67LTWVWYF/"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2025-05-12T20:59:53.759Z",
          "value": "Reported to Red Hat."
        },
        {
          "lang": "en",
          "time": "2025-04-23T00:00:00.000Z",
          "value": "Made public."
        }
      ],
      "title": "Nbd: nbdkit: integer overflow triggers an assertion resulting in denial of service",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      },
      "x_redhatCweChain": "CWE-190: Integer Overflow or Wraparound"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2025-47712",
    "datePublished": "2025-06-09T05:58:41.198Z",
    "dateReserved": "2025-05-07T21:08:45.449Z",
    "dateUpdated": "2026-11-05T15:49:54.806Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

OESA-2025-1778 (CVE-2025-47711)

CVE-2025-47711 (GCVE-0-2025-47711)

CVE-2025-47712 (GCVE-0-2025-47712)

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour