FKIE_CVE-2025-37954

Vulnerability from fkie_nvd - Published: 2025-05-20 16:15 - Updated: 2025-11-14 17:03
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: smb: client: Avoid race in open_cached_dir with lease breaks A pre-existing valid cfid returned from find_or_create_cached_dir might race with a lease break, meaning open_cached_dir doesn't consider it valid, and thinks it's newly-constructed. This leaks a dentry reference if the allocation occurs before the queued lease break work runs. Avoid the race by extending holding the cfid_list_lock across find_or_create_cached_dir and when the result is checked.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2407265dc32bc8cc45b62a612c2a214ba9038e8bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2ed98e89ebc2e1bc73534dc3c18cb7843a889ff9Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3ca02e63edccb78ef3659bebc68579c7224a6ca2Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/571dcf3d27b24800c171aea7b5e04ff06d10e2e9Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.15
linux linux_kernel 6.15
linux linux_kernel 6.15
linux linux_kernel 6.15
linux linux_kernel 6.15
To clipboard 

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: Avoid race in open_cached_dir with lease breaks\n\nA pre-existing valid cfid returned from find_or_create_cached_dir might\nrace with a lease break, meaning open_cached_dir doesn\u0027t consider it\nvalid, and thinks it\u0027s newly-constructed. This leaks a dentry reference\nif the allocation occurs before the queued lease break work runs.\n\nAvoid the race by extending holding the cfid_list_lock across\nfind_or_create_cached_dir and when the result is checked."
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      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: smb: cliente: Evitar la competencia en open_cached_dir con interrupciones de arrendamiento. Un cfid v\u00e1lido preexistente devuelto desde find_or_create_cached_dir podr\u00eda competir con una interrupci\u00f3n de arrendamiento, lo que significa que open_cached_dir no lo considera v\u00e1lido y cree que es de nueva construcci\u00f3n. Esto filtra una referencia de dentry si la asignaci\u00f3n ocurre antes de que se ejecute el trabajo de interrupci\u00f3n de arrendamiento en cola. Evite la competencia extendiendo la retenci\u00f3n de cfid_list_lock a trav\u00e9s de find_or_create_cached_dir y cuando se comprueba el resultado."
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  "id": "CVE-2025-37954",
  "lastModified": "2025-11-14T17:03:37.727",
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