Vulnerability-Lookup

GHSA-RW4V-J63G-MF75

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

Details

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

f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show()

In f2fs_sbi_show(), the extension_list, extension_count and hot_ext_count are read without holding sbi->sb_lock. If a concurrent sysfs store modifies the extension list via f2fs_update_extension_list(), the show path may read inconsistent count and array contents, potentially leading to out-of-bounds access or displaying stale data.

Fix this by holding sb_lock around the entire extension list read and format operation.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-53303"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-26T20:17:23Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: protect extension_list reading with sb_lock in f2fs_sbi_show()\n\nIn f2fs_sbi_show(), the extension_list, extension_count and\nhot_ext_count are read without holding sbi-\u003esb_lock. If a concurrent\nsysfs store modifies the extension list via f2fs_update_extension_list(),\nthe show path may read inconsistent count and array contents, potentially\nleading to out-of-bounds access or displaying stale data.\n\nFix this by holding sb_lock around the entire extension list read\nand format operation.",
  "id": "GHSA-rw4v-j63g-mf75",
  "modified": "2026-06-26T21:32:17Z",
  "published": "2026-06-26T21:32:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53303"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4b3a1bf4c2ffd4c9595d900ead78c9035894a025"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5909bedbed38c558bee7cb6758ceedf9bc3a9194"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cea15f66b7b68b2c50943a6660e0692c6635e4eb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d0e877810baf613b018fd9747440b9d4d9db1428"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d3ff0c121bbaef026df6248ab7ef6f0b068b0647"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ea3ab43a1f3cf2c7cecd75c8be1ee99a5e94a92e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-53303 (GCVE-0-2026-53303)

Vulnerability from cvelistv5 – Published: 2026-06-26 19:40 – Updated: 2026-06-26 19:40

Title

f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show()

Summary

In the Linux kernel, the following vulnerability has been resolved: f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show() In f2fs_sbi_show(), the extension_list, extension_count and hot_ext_count are read without holding sbi->sb_lock. If a concurrent sysfs store modifies the extension list via f2fs_update_extension_list(), the show path may read inconsistent count and array contents, potentially leading to out-of-bounds access or displaying stale data. Fix this by holding sb_lock around the entire extension list read and format operation.

Severity

No CVSS data available.

Assigner

Linux

References

6 references

URL	Tags
https://git.kernel.org/stable/c/d3ff0c121bbaef026…
https://git.kernel.org/stable/c/cea15f66b7b68b2c5…
https://git.kernel.org/stable/c/4b3a1bf4c2ffd4c95…
https://git.kernel.org/stable/c/d0e877810baf613b0…
https://git.kernel.org/stable/c/ea3ab43a1f3cf2c7c…
https://git.kernel.org/stable/c/5909bedbed38c558b…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: b6a06cbbb5f7fd03589cff9178314af04c568826 , < d3ff0c121bbaef026df6248ab7ef6f0b068b0647 (git) Affected: b6a06cbbb5f7fd03589cff9178314af04c568826 , < cea15f66b7b68b2c50943a6660e0692c6635e4eb (git) Affected: b6a06cbbb5f7fd03589cff9178314af04c568826 , < 4b3a1bf4c2ffd4c9595d900ead78c9035894a025 (git) Affected: b6a06cbbb5f7fd03589cff9178314af04c568826 , < d0e877810baf613b018fd9747440b9d4d9db1428 (git) Affected: b6a06cbbb5f7fd03589cff9178314af04c568826 , < ea3ab43a1f3cf2c7cecd75c8be1ee99a5e94a92e (git) Affected: b6a06cbbb5f7fd03589cff9178314af04c568826 , < 5909bedbed38c558bee7cb6758ceedf9bc3a9194 (git)
Linux	Linux	Affected: 4.17 Unaffected: 0 , < 4.17 (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.141 , ≤ 6.6.* (semver) Unaffected: 6.12.91 , ≤ 6.12.* (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": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/f2fs/sysfs.c"
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              "status": "unaffected",
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              "versionType": "semver"
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              "status": "unaffected",
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              "versionType": "semver"
            },
            {
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              "status": "unaffected",
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              "status": "unaffected",
              "version": "6.12.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
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              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
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              "versionType": "semver"
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            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-26T19:40:59.383Z",
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        },
        {
          "url": "https://git.kernel.org/stable/c/5909bedbed38c558bee7cb6758ceedf9bc3a9194"
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      ],
      "title": "f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show()",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53303",
    "datePublished": "2026-06-26T19:40:59.383Z",
    "dateReserved": "2026-06-09T07:44:35.397Z",
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    "state": "PUBLISHED"
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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.

Action not permitted

GHSA-RW4V-J63G-MF75

CVE-2026-53303 (GCVE-0-2026-53303)

Tags

Sightings

Nomenclature