CVE-2024-47740 (GCVE-0-2024-47740)

Vulnerability from cvelistv5 – Published: 2024-10-21 12:14 – Updated: 2026-05-11 20:39
VLAI
Title
f2fs: Require FMODE_WRITE for atomic write ioctls
Summary
In the Linux kernel, the following vulnerability has been resolved: f2fs: Require FMODE_WRITE for atomic write ioctls The F2FS ioctls for starting and committing atomic writes check for inode_owner_or_capable(), but this does not give LSMs like SELinux or Landlock an opportunity to deny the write access - if the caller's FSUID matches the inode's UID, inode_owner_or_capable() immediately returns true. There are scenarios where LSMs want to deny a process the ability to write particular files, even files that the FSUID of the process owns; but this can currently partially be bypassed using atomic write ioctls in two ways: - F2FS_IOC_START_ATOMIC_REPLACE + F2FS_IOC_COMMIT_ATOMIC_WRITE can truncate an inode to size 0 - F2FS_IOC_START_ATOMIC_WRITE + F2FS_IOC_ABORT_ATOMIC_WRITE can revert changes another process concurrently made to a file Fix it by requiring FMODE_WRITE for these operations, just like for F2FS_IOC_MOVE_RANGE. Since any legitimate caller should only be using these ioctls when intending to write into the file, that seems unlikely to break anything.
Severity
No CVSS data available.
Assigner
Impacted products
Vendor Product Version
Linux Linux Affected: 88b88a66797159949cec32eaab12b4968f6fae2d , < 700f3a7c7fa5764c9f24bbf7c78e0b6e479fa653 (git)
Affected: 88b88a66797159949cec32eaab12b4968f6fae2d , < 4ce87674c3a6b4d3b3d45f85b584ab8618a3cece (git)
Affected: 88b88a66797159949cec32eaab12b4968f6fae2d , < 000bab8753ae29a259feb339b99ee759795a48ac (git)
Affected: 88b88a66797159949cec32eaab12b4968f6fae2d , < 88ff021e1fea2d9b40b2d5efd9013c89f7be04ac (git)
Affected: 88b88a66797159949cec32eaab12b4968f6fae2d , < 32f348ecc149e9ca70a1c424ae8fa9b6919d2713 (git)
Affected: 88b88a66797159949cec32eaab12b4968f6fae2d , < 5e0de753bfe87768ebe6744d869caa92f35e5731 (git)
Affected: 88b88a66797159949cec32eaab12b4968f6fae2d , < f3bfac2cabf5333506b263bc0c8497c95302f32d (git)
Affected: 88b88a66797159949cec32eaab12b4968f6fae2d , < 4583290898c13c2c2e5eb8773886d153c2c5121d (git)
Affected: 88b88a66797159949cec32eaab12b4968f6fae2d , < 4f5a100f87f32cb65d4bb1ad282a08c92f6f591e (git)
Create a notification for this product.
Linux Linux Affected: 3.18
Unaffected: 0 , < 3.18 (semver)
Unaffected: 4.19.323 , ≤ 4.19.* (semver)
Unaffected: 5.4.285 , ≤ 5.4.* (semver)
Unaffected: 5.10.227 , ≤ 5.10.* (semver)
Unaffected: 5.15.168 , ≤ 5.15.* (semver)
Unaffected: 6.1.113 , ≤ 6.1.* (semver)
Unaffected: 6.6.54 , ≤ 6.6.* (semver)
Unaffected: 6.10.13 , ≤ 6.10.* (semver)
Unaffected: 6.11.2 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website

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      "id": "CVE-2024-47740",
      "lastModified": "2024-11-08T16:15:27.477",
      "published": "2024-10-21T13:15:04.103",
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Since any legitimate caller should only be using these\\nioctls when intending to write into the file, that seems unlikely to break\\nanything.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: f2fs: Requerir FMODE_WRITE para ioctls de escritura at\u00f3mica Los ioctls de F2FS para iniciar y confirmar escrituras at\u00f3micas comprueban inode_owner_or_capable(), pero esto no da a los LSM como SELinux o Landlock la oportunidad de denegar el acceso de escritura: si el FSUID del llamador coincide con el UID del inodo, inode_owner_or_capable() devuelve verdadero inmediatamente. Hay escenarios en los que los LSM quieren denegar a un proceso la capacidad de escribir archivos particulares, incluso archivos que el FSUID del proceso posee; pero esto actualmente se puede omitir parcialmente usando ioctls de escritura at\u00f3mica de dos maneras: - F2FS_IOC_START_ATOMIC_REPLACE + F2FS_IOC_COMMIT_ATOMIC_WRITE puede truncar un inodo a tama\u00f1o 0 - F2FS_IOC_START_ATOMIC_WRITE + F2FS_IOC_ABORT_ATOMIC_WRITE puede revertir los cambios que otro proceso realiz\u00f3 simult\u00e1neamente en un archivo Arr\u00e9glelo requiriendo FMODE_WRITE para estas operaciones, al igual que para F2FS_IOC_MOVE_RANGE. Dado que cualquier llamador leg\u00edtimo solo debe usar estos ioctls cuando tenga la intenci\u00f3n de escribir en el archivo, parece poco probable que eso rompa algo.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.18\",\"versionEndExcluding\":\"4.19.323\",\"matchCriteriaId\":\"4CF15846-AEEF-4FBF-BED3-18AFD682270F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.285\",\"matchCriteriaId\":\"B5A89369-320F-47FC-8695-56F61F87E4C0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.227\",\"matchCriteriaId\":\"795A3EE6-0CAB-4409-A903-151C94ACECC0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.168\",\"matchCriteriaId\":\"4D51C05D-455B-4D8D-89E7-A58E140B864C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.113\",\"matchCriteriaId\":\"D01BD22E-ACD1-4618-9D01-6116570BE1EE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.54\",\"matchCriteriaId\":\"D448821D-C085-4CAF-88FA-2DDE7BE21976\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.10.13\",\"matchCriteriaId\":\"CE94BB8D-B0AB-4563-9ED7-A12122B56EBE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.11\",\"versionEndExcluding\":\"6.11.2\",\"matchCriteriaId\":\"AB755D26-97F4-43B6-8604-CD076811E181\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/000bab8753ae29a259feb339b99ee759795a48ac\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/32f348ecc149e9ca70a1c424ae8fa9b6919d2713\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4583290898c13c2c2e5eb8773886d153c2c5121d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4ce87674c3a6b4d3b3d45f85b584ab8618a3cece\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4f5a100f87f32cb65d4bb1ad282a08c92f6f591e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5e0de753bfe87768ebe6744d869caa92f35e5731\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/700f3a7c7fa5764c9f24bbf7c78e0b6e479fa653\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/88ff021e1fea2d9b40b2d5efd9013c89f7be04ac\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f3bfac2cabf5333506b263bc0c8497c95302f32d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-03T22:21:36.961Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-47740\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-10-21T12:59:19.414286Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-10-21T12:59:22.941Z\"}}], \"cna\": {\"title\": \"f2fs: Require FMODE_WRITE for atomic write ioctls\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"88b88a66797159949cec32eaab12b4968f6fae2d\", \"lessThan\": \"700f3a7c7fa5764c9f24bbf7c78e0b6e479fa653\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"88b88a66797159949cec32eaab12b4968f6fae2d\", \"lessThan\": \"4ce87674c3a6b4d3b3d45f85b584ab8618a3cece\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"88b88a66797159949cec32eaab12b4968f6fae2d\", \"lessThan\": \"000bab8753ae29a259feb339b99ee759795a48ac\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"88b88a66797159949cec32eaab12b4968f6fae2d\", \"lessThan\": \"88ff021e1fea2d9b40b2d5efd9013c89f7be04ac\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"88b88a66797159949cec32eaab12b4968f6fae2d\", \"lessThan\": \"32f348ecc149e9ca70a1c424ae8fa9b6919d2713\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"88b88a66797159949cec32eaab12b4968f6fae2d\", \"lessThan\": \"5e0de753bfe87768ebe6744d869caa92f35e5731\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"88b88a66797159949cec32eaab12b4968f6fae2d\", \"lessThan\": \"f3bfac2cabf5333506b263bc0c8497c95302f32d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"88b88a66797159949cec32eaab12b4968f6fae2d\", \"lessThan\": \"4583290898c13c2c2e5eb8773886d153c2c5121d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"88b88a66797159949cec32eaab12b4968f6fae2d\", \"lessThan\": \"4f5a100f87f32cb65d4bb1ad282a08c92f6f591e\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/f2fs/file.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.18\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.18\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.19.323\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.285\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.227\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.168\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.113\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.54\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.10.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.11.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/f2fs/file.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/700f3a7c7fa5764c9f24bbf7c78e0b6e479fa653\"}, {\"url\": \"https://git.kernel.org/stable/c/4ce87674c3a6b4d3b3d45f85b584ab8618a3cece\"}, {\"url\": \"https://git.kernel.org/stable/c/000bab8753ae29a259feb339b99ee759795a48ac\"}, {\"url\": \"https://git.kernel.org/stable/c/88ff021e1fea2d9b40b2d5efd9013c89f7be04ac\"}, {\"url\": \"https://git.kernel.org/stable/c/32f348ecc149e9ca70a1c424ae8fa9b6919d2713\"}, {\"url\": \"https://git.kernel.org/stable/c/5e0de753bfe87768ebe6744d869caa92f35e5731\"}, {\"url\": \"https://git.kernel.org/stable/c/f3bfac2cabf5333506b263bc0c8497c95302f32d\"}, {\"url\": \"https://git.kernel.org/stable/c/4583290898c13c2c2e5eb8773886d153c2c5121d\"}, {\"url\": \"https://git.kernel.org/stable/c/4f5a100f87f32cb65d4bb1ad282a08c92f6f591e\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nf2fs: Require FMODE_WRITE for atomic write ioctls\\n\\nThe F2FS ioctls for starting and committing atomic writes check for\\ninode_owner_or_capable(), but this does not give LSMs like SELinux or\\nLandlock an opportunity to deny the write access - if the caller\u0027s FSUID\\nmatches the inode\u0027s UID, inode_owner_or_capable() immediately returns true.\\n\\nThere are scenarios where LSMs want to deny a process the ability to write\\nparticular files, even files that the FSUID of the process owns; but this\\ncan currently partially be bypassed using atomic write ioctls in two ways:\\n\\n - F2FS_IOC_START_ATOMIC_REPLACE + F2FS_IOC_COMMIT_ATOMIC_WRITE can\\n   truncate an inode to size 0\\n - F2FS_IOC_START_ATOMIC_WRITE + F2FS_IOC_ABORT_ATOMIC_WRITE can revert\\n   changes another process concurrently made to a file\\n\\nFix it by requiring FMODE_WRITE for these operations, just like for\\nF2FS_IOC_MOVE_RANGE. Since any legitimate caller should only be using these\\nioctls when intending to write into the file, that seems unlikely to break\\nanything.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.323\", \"versionStartIncluding\": \"3.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.285\", \"versionStartIncluding\": \"3.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.227\", \"versionStartIncluding\": \"3.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.168\", \"versionStartIncluding\": \"3.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.113\", \"versionStartIncluding\": \"3.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.54\", \"versionStartIncluding\": \"3.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10.13\", \"versionStartIncluding\": \"3.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11.2\", \"versionStartIncluding\": \"3.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12\", \"versionStartIncluding\": \"3.18\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:38:45.311Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-47740\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-03T22:21:36.961Z\", \"dateReserved\": \"2024-09-30T16:00:12.959Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-10-21T12:14:09.171Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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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.

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.


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Detection rules are retrieved from Rulezet.

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