Vulnerability-Lookup

GHSA-3F4P-8QJ7-5FXP

Vulnerability from github – Published: 2025-02-27 21:32 – Updated: 2026-09-07 18:31

Details

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

block: mark GFP_NOIO around sysfs ->store()

sysfs ->store is called with queue freezed, meantime we have several ->store() callbacks(update_nr_requests, wbt, scheduler) to allocate memory with GFP_KERNEL which may run into direct reclaim code path, then potential deadlock can be caused.

Fix the issue by marking NOIO around sysfs ->store()

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-2025-21817"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-667"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-27T20:16:04Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: mark GFP_NOIO around sysfs -\u003estore()\n\nsysfs -\u003estore is called with queue freezed, meantime we have several\n-\u003estore() callbacks(update_nr_requests, wbt, scheduler) to allocate\nmemory with GFP_KERNEL which may run into direct reclaim code path,\nthen potential deadlock can be caused.\n\nFix the issue by marking NOIO around sysfs -\u003estore()",
  "id": "GHSA-3f4p-8qj7-5fxp",
  "modified": "2026-09-07T18:31:30Z",
  "published": "2025-02-27T21:32:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21817"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2566ce907e5d5db8a039647208e029ce559baa31"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a09280c39ea54080daf19cfaf4a3121a8d17d5cd"
    }
  ],
  "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-2025-21817 (GCVE-0-2025-21817)

Vulnerability from cvelistv5 – Published: 2025-02-27 20:04 – Updated: 2026-09-07 15:44

Title

block: mark GFP_NOIO around sysfs ->store()

Summary

In the Linux kernel, the following vulnerability has been resolved: block: mark GFP_NOIO around sysfs ->store() sysfs ->store is called with queue freezed, meantime we have several ->store() callbacks(update_nr_requests, wbt, scheduler) to allocate memory with GFP_KERNEL which may run into direct reclaim code path, then potential deadlock can be caused. Fix the issue by marking NOIO around sysfs ->store()

Severity

No CVSS data available.

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/a09280c39ea54080d…
https://git.kernel.org/stable/c/2566ce907e5d5db8a…
https://git.kernel.org/stable/c/7c0be4ead1f8f5f8b…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1645cd7fd42c236c952e9228badcac4fea1829ea , < a09280c39ea54080daf19cfaf4a3121a8d17d5cd (git) Affected: 8985da5481562e96b95e94ed8e5cc9b6565eb82b , < 2566ce907e5d5db8a039647208e029ce559baa31 (git) Affected: c99f66e4084a62a2cc401c4704a84328aeddc9ec , < 7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c (git)
Linux	Linux	Affected: 6.12.96 , < 6.12.109 (semver) Affected: 6.13.2 , < 6.13.3 (semver)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "block/blk-sysfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "8985da5481562e96b95e94ed8e5cc9b6565eb82b",
              "versionType": "git"
            },
            {
              "lessThan": "7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c",
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              "version": "c99f66e4084a62a2cc401c4704a84328aeddc9ec",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "block/blk-sysfs.c"
          ],
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          "vendor": "Linux",
          "versions": [
            {
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              "status": "affected",
              "version": "6.12.96",
              "versionType": "semver"
            },
            {
              "lessThan": "6.13.3",
              "status": "affected",
              "version": "6.13.2",
              "versionType": "semver"
            }
          ]
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      ],
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          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "6.12.96",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "6.13.3",
                  "versionStartIncluding": "6.13.2",
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                }
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: mark GFP_NOIO around sysfs -\u003estore()\n\nsysfs -\u003estore is called with queue freezed, meantime we have several\n-\u003estore() callbacks(update_nr_requests, wbt, scheduler) to allocate\nmemory with GFP_KERNEL which may run into direct reclaim code path,\nthen potential deadlock can be caused.\n\nFix the issue by marking NOIO around sysfs -\u003estore()"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-07T15:44:41.250Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c"
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      "title": "block: mark GFP_NOIO around sysfs -\u003estore()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21817",
    "datePublished": "2025-02-27T20:04:15.988Z",
    "dateReserved": "2024-12-29T08:45:45.774Z",
    "dateUpdated": "2026-09-07T15:44:41.250Z",
    "state": "PUBLISHED"
  },
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  "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.
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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.

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.
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GHSA-3F4P-8QJ7-5FXP

CVE-2025-21817 (GCVE-0-2025-21817)

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