CVE-2024-46840

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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/03804641ec2d0da4fa088ad21c88e703d151ce16	Patch
https://git.kernel.org/stable/c/71291aa7246645ef622621934d2067400380645e	Patch
https://git.kernel.org/stable/c/728d4d045b628e006b48a448f3326a7194c88d32	Patch
https://git.kernel.org/stable/c/7d1df13bf078ffebfedd361d714ff6cee1ff01b9	Patch
https://git.kernel.org/stable/c/9cc887ac24b7a0598f4042ae9af6b9a33072f75b	Patch
https://git.kernel.org/stable/c/b8ccef048354074a548f108e51d0557d6adfd3a3	Patch
https://git.kernel.org/stable/c/c60676b81fab456b672796830f6d8057058f029c	Patch
https://git.kernel.org/stable/c/c847b28a799733b04574060ab9d00f215970627d	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2024-09-27 13:15

Updated : 2024-10-08 18:15

NVD link : CVE-2024-46840

Mitre link : CVE-2024-46840

CVE.ORG link : CVE-2024-46840

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-noinfo

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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."}, {"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. 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