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

Vulnerability from cvelistv5 – Published: 2026-06-26 19:40 – Updated: 2026-06-26 19:40
VLAI
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
References
Impacted 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)
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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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{
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              "version": "7.0.10",
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      "cpeApplicability": [
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          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-26T19:40:59.383Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
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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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    "datePublished": "2026-06-26T19:40:59.383Z",
    "dateReserved": "2026-06-09T07:44:35.397Z",
    "dateUpdated": "2026-06-26T19:40:59.383Z",
    "state": "PUBLISHED"
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  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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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.


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