CVE-2025-21811 (GCVE-0-2025-21811)

Vulnerability from cvelistv5 – Published: 2025-02-27 20:01 – Updated: 2026-05-11 21:06
VLAI
Title
nilfs2: protect access to buffers with no active references
Summary
In the Linux kernel, the following vulnerability has been resolved: nilfs2: protect access to buffers with no active references nilfs_lookup_dirty_data_buffers(), which iterates through the buffers attached to dirty data folios/pages, accesses the attached buffers without locking the folios/pages. For data cache, nilfs_clear_folio_dirty() may be called asynchronously when the file system degenerates to read only, so nilfs_lookup_dirty_data_buffers() still has the potential to cause use after free issues when buffers lose the protection of their dirty state midway due to this asynchronous clearing and are unintentionally freed by try_to_free_buffers(). Eliminate this race issue by adjusting the lock section in this function.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 8c26c4e2694a163d525976e804d81cd955bbb40c , < e1fc4a90a90ea8514246c45435662531975937d9 (git)
Affected: 8c26c4e2694a163d525976e804d81cd955bbb40c , < 72cf688d0ce7e642b12ddc9b2a42524737ec1b4a (git)
Affected: 8c26c4e2694a163d525976e804d81cd955bbb40c , < d8ff250e085a4c4cdda4ad1cdd234ed110393143 (git)
Affected: 8c26c4e2694a163d525976e804d81cd955bbb40c , < 58c27fa7a610b6e8d44e6220e7dbddfbaccaf439 (git)
Affected: 8c26c4e2694a163d525976e804d81cd955bbb40c , < 8e1b9201c9a24638cf09c6e1c9f224157328010b (git)
Affected: 8c26c4e2694a163d525976e804d81cd955bbb40c , < 4b08d23d7d1917bef4fbee8ad81372f49b006656 (git)
Affected: 8c26c4e2694a163d525976e804d81cd955bbb40c , < c437dfac9f7a5a46ac2a5e6d6acd3059e9f68188 (git)
Affected: 8c26c4e2694a163d525976e804d81cd955bbb40c , < 367a9bffabe08c04f6d725032cce3d891b2b9e1a (git)
Create a notification for this product.
Linux Linux Affected: 3.10
Unaffected: 0 , < 3.10 (semver)
Unaffected: 5.4.291 , ≤ 5.4.* (semver)
Unaffected: 5.10.235 , ≤ 5.10.* (semver)
Unaffected: 5.15.179 , ≤ 5.15.* (semver)
Unaffected: 6.1.129 , ≤ 6.1.* (semver)
Unaffected: 6.6.76 , ≤ 6.6.* (semver)
Unaffected: 6.12.13 , ≤ 6.12.* (semver)
Unaffected: 6.13.2 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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[{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-03-04T18:01:20.629324Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-03-04T18:01:21.977Z\"}}], \"cna\": {\"title\": \"nilfs2: protect access to buffers with no active references\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"8c26c4e2694a163d525976e804d81cd955bbb40c\", \"lessThan\": \"e1fc4a90a90ea8514246c45435662531975937d9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8c26c4e2694a163d525976e804d81cd955bbb40c\", \"lessThan\": \"72cf688d0ce7e642b12ddc9b2a42524737ec1b4a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8c26c4e2694a163d525976e804d81cd955bbb40c\", \"lessThan\": \"d8ff250e085a4c4cdda4ad1cdd234ed110393143\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8c26c4e2694a163d525976e804d81cd955bbb40c\", \"lessThan\": \"58c27fa7a610b6e8d44e6220e7dbddfbaccaf439\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8c26c4e2694a163d525976e804d81cd955bbb40c\", \"lessThan\": \"8e1b9201c9a24638cf09c6e1c9f224157328010b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8c26c4e2694a163d525976e804d81cd955bbb40c\", \"lessThan\": \"4b08d23d7d1917bef4fbee8ad81372f49b006656\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8c26c4e2694a163d525976e804d81cd955bbb40c\", \"lessThan\": \"c437dfac9f7a5a46ac2a5e6d6acd3059e9f68188\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8c26c4e2694a163d525976e804d81cd955bbb40c\", \"lessThan\": \"367a9bffabe08c04f6d725032cce3d891b2b9e1a\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/nilfs2/segment.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.10\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.10\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.291\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.235\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.179\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.129\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.76\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.13.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.13.*\"}, {\"status\": \"unaffected\", \"version\": \"6.14\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/nilfs2/segment.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/e1fc4a90a90ea8514246c45435662531975937d9\"}, {\"url\": \"https://git.kernel.org/stable/c/72cf688d0ce7e642b12ddc9b2a42524737ec1b4a\"}, {\"url\": \"https://git.kernel.org/stable/c/d8ff250e085a4c4cdda4ad1cdd234ed110393143\"}, {\"url\": \"https://git.kernel.org/stable/c/58c27fa7a610b6e8d44e6220e7dbddfbaccaf439\"}, {\"url\": \"https://git.kernel.org/stable/c/8e1b9201c9a24638cf09c6e1c9f224157328010b\"}, {\"url\": \"https://git.kernel.org/stable/c/4b08d23d7d1917bef4fbee8ad81372f49b006656\"}, {\"url\": \"https://git.kernel.org/stable/c/c437dfac9f7a5a46ac2a5e6d6acd3059e9f68188\"}, {\"url\": \"https://git.kernel.org/stable/c/367a9bffabe08c04f6d725032cce3d891b2b9e1a\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnilfs2: protect access to buffers with no active references\\n\\nnilfs_lookup_dirty_data_buffers(), which iterates through the buffers\\nattached to dirty data folios/pages, accesses the attached buffers without\\nlocking the folios/pages.\\n\\nFor data cache, nilfs_clear_folio_dirty() may be called asynchronously\\nwhen the file system degenerates to read only, so\\nnilfs_lookup_dirty_data_buffers() still has the potential to cause use\\nafter free issues when buffers lose the protection of their dirty state\\nmidway due to this asynchronous clearing and are unintentionally freed by\\ntry_to_free_buffers().\\n\\nEliminate this race issue by adjusting the lock section in this function.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.291\", \"versionStartIncluding\": \"3.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.235\", \"versionStartIncluding\": \"3.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.179\", \"versionStartIncluding\": \"3.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.129\", \"versionStartIncluding\": \"3.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.76\", \"versionStartIncluding\": \"3.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.13\", \"versionStartIncluding\": \"3.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.13.2\", \"versionStartIncluding\": \"3.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.14\", \"versionStartIncluding\": \"3.10\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T21:06:59.508Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-21811\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T21:06:59.508Z\", \"dateReserved\": \"2024-12-29T08:45:45.772Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-02-27T20:01:02.256Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Taxonomy of the tags.





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.

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.