Vulnerability-Lookup

GHSA-2R98-R7QJ-J43V

Vulnerability from github – Published: 2026-10-23 12:31 – Updated: 2026-10-23 12:31

Details

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

btrfs: protect sb_write_pointer() with invalidate lock

sb_write_pointer() reads the super block from the block device page cache using read_cache_page_gfp(). This has the same race with BLKBSZSET as the one fixed by commit 3f29d661e568 ("btrfs: sync read disk super and set block size").

Take the mapping invalidate lock around read_cache_page_gfp() to serialize the read against block size changes.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-98907"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-23T12:18:24Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: protect sb_write_pointer() with invalidate lock\n\nsb_write_pointer() reads the super block from the block device page cache\nusing read_cache_page_gfp(). This has the same race with BLKBSZSET as the\none fixed by commit 3f29d661e568 (\"btrfs: sync read disk super and set\nblock size\").\n\nTake the mapping invalidate lock around read_cache_page_gfp() to\nserialize the read against block size changes.",
  "id": "GHSA-2r98-r7qj-j43v",
  "modified": "2026-10-23T12:31:37Z",
  "published": "2026-10-23T12:31:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98907"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/123b9a545f4d0348e81f558a032bf2a93ee5722f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1a6c92aa7242a04e4349c0ea213dbf703a1c9891"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/80cd97c5e90096d040a623851795eac92fbd0ff1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a0dc28359a8a26f970ccd250b126a2e0bd4118a5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a58cab4535f085adc0f93d7efd7952ef437371da"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c9b38f2eab5a9bd74087390318d93ccdd8d2deff"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-98907 (GCVE-0-2026-98907)

Vulnerability from cvelistv5 – Published: 2026-10-23 11:54 – Updated: 2026-10-26 06:56

Title

btrfs: protect sb_write_pointer() with invalidate lock

Summary

In the Linux kernel, the following vulnerability has been resolved: btrfs: protect sb_write_pointer() with invalidate lock sb_write_pointer() reads the super block from the block device page cache using read_cache_page_gfp(). This has the same race with BLKBSZSET as the one fixed by commit 3f29d661e568 ("btrfs: sync read disk super and set block size"). Take the mapping invalidate lock around read_cache_page_gfp() to serialize the read against block size changes.

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7067 records in the last 180 days details

References

2 references

URL	Tags
https://git.kernel.org/stable/c/80cd97c5e90096d04…
https://git.kernel.org/stable/c/123b9a545f4d0348e…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 3c20917120ce61f2a123ca0810293872f4c6b5a4 , < 80cd97c5e90096d040a623851795eac92fbd0ff1 (git) Affected: 3c20917120ce61f2a123ca0810293872f4c6b5a4 , < 123b9a545f4d0348e81f558a032bf2a93ee5722f (git)
Linux	Linux	Affected: 6.15 Unaffected: 0 , < 6.15 (semver) Unaffected: 6.18.53 , ≤ 6.18.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
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        {
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          "programFiles": [
            "fs/btrfs/zoned.c"
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          "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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              "lessThan": "123b9a545f4d0348e81f558a032bf2a93ee5722f",
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          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
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              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
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          "nodes": [
            {
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                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.15",
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                }
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              "negate": false,
              "operator": "OR"
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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\nbtrfs: protect sb_write_pointer() with invalidate lock\n\nsb_write_pointer() reads the super block from the block device page cache\nusing read_cache_page_gfp(). This has the same race with BLKBSZSET as the\none fixed by commit 3f29d661e568 (\"btrfs: sync read disk super and set\nblock size\").\n\nTake the mapping invalidate lock around read_cache_page_gfp() to\nserialize the read against block size changes."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-26T06:56:36.536Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
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          "url": "https://git.kernel.org/stable/c/80cd97c5e90096d040a623851795eac92fbd0ff1"
        },
        {
          "url": "https://git.kernel.org/stable/c/123b9a545f4d0348e81f558a032bf2a93ee5722f"
        }
      ],
      "title": "btrfs: protect sb_write_pointer() with invalidate lock",
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        "engine": "bippy-1.2.0"
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98907",
    "datePublished": "2026-10-23T11:54:44.224Z",
    "dateReserved": "2026-09-25T10:25:14.379Z",
    "dateUpdated": "2026-10-26T06:56:36.536Z",
    "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

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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.
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