Vulnerability-Lookup

FKIE_CVE-2024-56709

Vulnerability from fkie_nvd - Published: 2024-12-29 09:15 - Updated: 2026-08-04 11:22

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: io_uring: check if iowq is killed before queuing task work can be executed after the task has gone through io_uring termination, whether it's the final task_work run or the fallback path. In this case, task work will find ->io_wq being already killed and null'ed, which is a problem if it then tries to forward the request to io_queue_iowq(). Make io_queue_iowq() fail requests in this case. Note that it also checks PF_KTHREAD, because the user can first close a DEFER_TASKRUN ring and shortly after kill the task, in which case ->iowq check would race.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2ca94c8de36091067b9ce7527ae8db3812d38781	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4f95a2186b7f2af09331e1e8069bcaf34fe019cf	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/534d59ab38010aada88390db65985e65d0de7d9e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/dbd2ca9367eb19bc5e269b8c58b0b1514ada9156	Patch
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	5.14
linux	linux_kernel	5.14
linux	linux_kernel	5.14
linux	linux_kernel	5.14
linux	linux_kernel	5.14
linux	linux_kernel	6.13
linux	linux_kernel	6.13
linux	linux_kernel	6.13

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "io_uring/io_uring.c"
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          "vendor": "Linux",
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              "status": "unaffected",
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              "versionType": "original_commit_for_fix"
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        }
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: check if iowq is killed before queuing\n\ntask work can be executed after the task has gone through io_uring\ntermination, whether it\u0027s the final task_work run or the fallback path.\nIn this case, task work will find -\u003eio_wq being already killed and\nnull\u0027ed, which is a problem if it then tries to forward the request to\nio_queue_iowq(). Make io_queue_iowq() fail requests in this case.\n\nNote that it also checks PF_KTHREAD, because the user can first close\na DEFER_TASKRUN ring and shortly after kill the task, in which case\n-\u003eiowq check would race."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: io_uring: comprueba si iowq se elimina antes de que se pueda ejecutar la tarea de cola work despu\u00e9s de que la tarea haya pasado por la terminaci\u00f3n io_uring, ya sea la ejecuci\u00f3n final de task_work o la ruta de respaldo. En este caso, la tarea work encontrar\u00e1 que -\u0026gt;io_wq ya se ha eliminado y se ha anulado, lo que es un problema si luego intenta reenviar la solicitud a io_queue_iowq(). Haz que io_queue_iowq() falle las solicitudes en este caso. Ten en cuenta que tambi\u00e9n comprueba PF_KTHREAD, porque el usuario puede cerrar primero un anillo DEFER_TASKRUN y poco despu\u00e9s eliminar la tarea, en cuyo caso la comprobaci\u00f3n de -\u0026gt;iowq se acelerar\u00eda."
    }
  ],
  "id": "CVE-2024-56709",
  "lastModified": "2026-08-04T11:22:23.277",
  "metrics": {
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
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          "baseScore": 7.8,
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          "confidentialityImpact": "HIGH",
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          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
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        "source": "nvd@nist.gov",
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  "vulnStatus": "Modified",
  "weaknesses": [
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}

CVE-2024-56709 (GCVE-0-2024-56709)

Vulnerability from cvelistv5 – Published: 2024-12-29 08:42 – Updated: 2026-08-05 11:46

Title

io_uring: check if iowq is killed before queuing

Summary

Severity

7.8 (High)


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

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6665 records in the last 180 days details

References

5 references

URL	Tags
https://git.kernel.org/stable/c/534d59ab38010aada…
https://git.kernel.org/stable/c/2ca94c8de36091067…
https://git.kernel.org/stable/c/4f95a2186b7f2af09…
https://git.kernel.org/stable/c/dbd2ca9367eb19bc5…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 773af69121ecc6c53d192661af8d53bb3db028ae , < 534d59ab38010aada88390db65985e65d0de7d9e (git) Affected: 773af69121ecc6c53d192661af8d53bb3db028ae , < 2ca94c8de36091067b9ce7527ae8db3812d38781 (git) Affected: 773af69121ecc6c53d192661af8d53bb3db028ae , < 4f95a2186b7f2af09331e1e8069bcaf34fe019cf (git) Affected: 773af69121ecc6c53d192661af8d53bb3db028ae , < dbd2ca9367eb19bc5e269b8c58b0b1514ada9156 (git)
Linux	Linux	Affected: 5.14 Unaffected: 0 , < 5.14 (semver) Unaffected: 6.1.122 , ≤ 6.1.* (semver) Unaffected: 6.6.68 , ≤ 6.6.* (semver) Unaffected: 6.12.7 , ≤ 6.12.* (semver) Unaffected: 6.13 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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        "title": "CVE Program Container"
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  },
  "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

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.

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