fkie_cve-2024-46840
Vulnerability from fkie_nvd
Published
2024-09-27 13:15
Modified
2025-11-03 23:16
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: btrfs: clean up our handling of refs == 0 in snapshot delete In reada we BUG_ON(refs == 0), which could be unkind since we aren't holding a lock on the extent leaf and thus could get a transient incorrect answer. In walk_down_proc we also BUG_ON(refs == 0), which could happen if we have extent tree corruption. Change that to return -EUCLEAN. In do_walk_down() we catch this case and handle it correctly, however we return -EIO, which -EUCLEAN is a more appropriate error code. Finally in walk_up_proc we have the same BUG_ON(refs == 0), so convert that to proper error handling. Also adjust the error message so we can actually do something with the information.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/03804641ec2d0da4fa088ad21c88e703d151ce16Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/71291aa7246645ef622621934d2067400380645ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/728d4d045b628e006b48a448f3326a7194c88d32Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7d1df13bf078ffebfedd361d714ff6cee1ff01b9Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9cc887ac24b7a0598f4042ae9af6b9a33072f75bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b8ccef048354074a548f108e51d0557d6adfd3a3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c60676b81fab456b672796830f6d8057058f029cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c847b28a799733b04574060ab9d00f215970627dPatch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html
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 *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: clean up our handling of refs == 0 in snapshot delete\n\nIn reada we BUG_ON(refs == 0), which could be unkind since we aren\u0027t\nholding a lock on the extent leaf and thus could get a transient\nincorrect answer.  In walk_down_proc we also BUG_ON(refs == 0), which\ncould happen if we have extent tree corruption.  Change that to return\n-EUCLEAN.  In do_walk_down() we catch this case and handle it correctly,\nhowever we return -EIO, which -EUCLEAN is a more appropriate error code.\nFinally in walk_up_proc we have the same BUG_ON(refs == 0), so convert\nthat to proper error handling.  Also adjust the error message so we can\nactually do something with the information."
    },
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      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: limpia nuestro manejo de refs == 0 en la eliminaci\u00f3n de instant\u00e1neas En reada tenemos BUG_ON(refs == 0), lo que podr\u00eda ser desagradable ya que no estamos manteniendo un bloqueo en la hoja de extensi\u00f3n y, por lo tanto, podr\u00edamos obtener una respuesta incorrecta transitoria. En walk_down_proc tambi\u00e9n tenemos BUG_ON(refs == 0), lo que podr\u00eda suceder si tenemos corrupci\u00f3n del \u00e1rbol de extensi\u00f3n. Cambia eso para que devuelva -EUCLEAN. En do_walk_down() capturamos este caso y lo manejamos correctamente, sin embargo, devolvemos -EIO, que -EUCLEAN es un c\u00f3digo de error m\u00e1s apropiado. Finalmente, en walk_up_proc tenemos el mismo BUG_ON(refs == 0), as\u00ed que convi\u00e9rtelo en un manejo de errores adecuado. Tambi\u00e9n ajusta el mensaje de error para que podamos hacer algo con la informaci\u00f3n."
    }
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  "id": "CVE-2024-46840",
  "lastModified": "2025-11-03T23:16:07.230",
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          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "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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}


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