FKIE_CVE-2024-40972

Vulnerability from fkie_nvd - Published: 2024-07-12 13:15 - Updated: 2025-11-03 22:17
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ext4: do not create EA inode under buffer lock ext4_xattr_set_entry() creates new EA inodes while holding buffer lock on the external xattr block. This is problematic as it nests all the allocation locking (which acquires locks on other buffers) under the buffer lock. This can even deadlock when the filesystem is corrupted and e.g. quota file is setup to contain xattr block as data block. Move the allocation of EA inode out of ext4_xattr_set_entry() into the callers.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0752e7fb549d90c33b4d4186f11cfd25a556d1ddPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0a46ef234756dca04623b7591e8ebb3440622f0bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/111103907234bffd0a34fba070ad9367de058752Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/737fb7853acd5bc8984f6f42e4bfba3334be8ae1Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0a46ef234756dca04623b7591e8ebb3440622f0bPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/111103907234bffd0a34fba070ad9367de058752Patch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

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  "descriptions": [
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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: do not create EA inode under buffer lock\n\next4_xattr_set_entry() creates new EA inodes while holding buffer lock\non the external xattr block. This is problematic as it nests all the\nallocation locking (which acquires locks on other buffers) under the\nbuffer lock. This can even deadlock when the filesystem is corrupted and\ne.g. quota file is setup to contain xattr block as data block. Move the\nallocation of EA inode out of ext4_xattr_set_entry() into the callers."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ext4: no crear inodo EA bajo bloqueo de b\u00fafer ext4_xattr_set_entry() crea nuevos inodos EA mientras mantiene el bloqueo de b\u00fafer en el bloque xattr externo. Esto es problem\u00e1tico ya que anida todo el bloqueo de asignaci\u00f3n (que adquiere bloqueos en otros b\u00fafer) bajo el bloqueo del b\u00fafer. Esto puede incluso bloquearse cuando el sistema de archivos est\u00e1 da\u00f1ado y, por ejemplo, el archivo de cuota est\u00e1 configurado para contener el bloque xattr como bloque de datos. Mueva la asignaci\u00f3n del inodo EA de ext4_xattr_set_entry() a las personas que llaman."
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  "id": "CVE-2024-40972",
  "lastModified": "2025-11-03T22:17:19.160",
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          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
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          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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  "vulnStatus": "Modified",
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}


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