Vulnerability-Lookup

GHSA-G22F-3WV9-PGVJ

Vulnerability from github – Published: 2026-06-26 21:32 – Updated: 2026-07-06 21:30

Details

In the Linux kernel, the following vulnerability has been resolved:

io_uring/napi: cap busy_poll_to 10 msec

Currently there's no cap on the maximum amount of time that napi is allowed to poll if no events are found, which can lead to kernel complaints on a task being stuck as there's no conditional rescheduling done within that loop.

Just cap it to 10 msec in total, that's already way above any kind of sane value that will reap any benefits, yet low enough that it's nowhere near being able to trigger preemption complaints.

Severity

5.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-53321"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-26T20:17:25Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/napi: cap busy_poll_to 10 msec\n\nCurrently there\u0027s no cap on the maximum amount of time that napi is\nallowed to poll if no events are found, which can lead to kernel\ncomplaints on a task being stuck as there\u0027s no conditional rescheduling\ndone within that loop.\n\nJust cap it to 10 msec in total, that\u0027s already way above any kind of\nsane value that will reap any benefits, yet low enough that it\u0027s\nnowhere near being able to trigger preemption complaints.",
  "id": "GHSA-g22f-3wv9-pgvj",
  "modified": "2026-07-06T21:30:26Z",
  "published": "2026-06-26T21:32:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53321"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/39767f944a8c9e696566c37ad5b20131406c4b8d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cb3af525f8dfb8930f0c123e5755fa967a12d5c1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/df8599ee18c0e5fe343ffe0b4c379636b8bb839a"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-53321 (GCVE-0-2026-53321)

Vulnerability from cvelistv5 – Published: 2026-06-26 19:41 – Updated: 2026-06-26 19:41

Title

io_uring/napi: cap busy_poll_to 10 msec

Summary

In the Linux kernel, the following vulnerability has been resolved: io_uring/napi: cap busy_poll_to 10 msec Currently there's no cap on the maximum amount of time that napi is allowed to poll if no events are found, which can lead to kernel complaints on a task being stuck as there's no conditional rescheduling done within that loop. Just cap it to 10 msec in total, that's already way above any kind of sane value that will reap any benefits, yet low enough that it's nowhere near being able to trigger preemption complaints.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/39767f944a8c9e696…
https://git.kernel.org/stable/c/cb3af525f8dfb8930…
https://git.kernel.org/stable/c/df8599ee18c0e5fe3…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 8d0c12a80cdeb80d5e0510e96d38fe551ed8e9b5 , < 39767f944a8c9e696566c37ad5b20131406c4b8d (git) Affected: 8d0c12a80cdeb80d5e0510e96d38fe551ed8e9b5 , < cb3af525f8dfb8930f0c123e5755fa967a12d5c1 (git) Affected: 8d0c12a80cdeb80d5e0510e96d38fe551ed8e9b5 , < df8599ee18c0e5fe343ffe0b4c379636b8bb839a (git)
Linux	Linux	Affected: 6.9 Unaffected: 0 , < 6.9 (semver) Unaffected: 6.18.33 , ≤ 6.18.* (semver) Unaffected: 7.0.10 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
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          "programFiles": [
            "io_uring/napi.c"
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              "versionType": "git"
            },
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          "versions": [
            {
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              "version": "6.9"
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              "status": "unaffected",
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            },
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              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
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        }
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                  "vulnerable": true
                }
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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.

Detection rules are retrieved from Rulezet.

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

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