CVE-2026-23292 (GCVE-0-2026-23292)

Vulnerability from cvelistv5 – Published: 2026-03-25 10:26 – Updated: 2026-05-23 16:04
VLAI
Title
scsi: target: Fix recursive locking in __configfs_open_file()
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: target: Fix recursive locking in __configfs_open_file() In flush_write_buffer, &p->frag_sem is acquired and then the loaded store function is called, which, here, is target_core_item_dbroot_store(). This function called filp_open(), following which these functions were called (in reverse order), according to the call trace: down_read __configfs_open_file do_dentry_open vfs_open do_open path_openat do_filp_open file_open_name filp_open target_core_item_dbroot_store flush_write_buffer configfs_write_iter target_core_item_dbroot_store() tries to validate the new file path by trying to open the file path provided to it; however, in this case, the bug report shows: db_root: not a directory: /sys/kernel/config/target/dbroot indicating that the same configfs file was tried to be opened, on which it is currently working on. Thus, it is trying to acquire frag_sem semaphore of the same file of which it already holds the semaphore obtained in flush_write_buffer(), leading to acquiring the semaphore in a nested manner and a possibility of recursive locking. Fix this by modifying target_core_item_dbroot_store() to use kern_path() instead of filp_open() to avoid opening the file using filesystem-specific function __configfs_open_file(), and further modifying it to make this fix compatible.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: b0841eefd9693827afb9888235e26ddd098f9cef , < 3161ef61f121d4573cad5b57c92188dcd9b284b3 (git)
Affected: b0841eefd9693827afb9888235e26ddd098f9cef , < e8ef82cb6443d5f3260b1b830e17f03dda4229ea (git)
Affected: b0841eefd9693827afb9888235e26ddd098f9cef , < 4fcfa424a581d823cb1a9676e3eefe6ca17e453a (git)
Affected: b0841eefd9693827afb9888235e26ddd098f9cef , < 9a5641024fbfd9b24fe65984ad85fea10a3ae438 (git)
Affected: b0841eefd9693827afb9888235e26ddd098f9cef , < 142eacb50fb903a4c10dee7e67b6e79ebb36a582 (git)
Affected: b0841eefd9693827afb9888235e26ddd098f9cef , < 14d4ac19d1895397532eec407433c5d74d9da53b (git)
Affected: 49824b5c875087a52672b0c8e8ecbefe6f773532 (git)
Affected: 09e21253d17f53bdb5aac0e0dbd057a29fcbe8d1 (git)
Affected: 0dfc45be875a378c2a3a4d6ed8e668ec8eb75073 (git)
Affected: 4.9.201 , < 4.10 (semver)
Affected: 4.14.154 , < 4.15 (semver)
Affected: 4.19.84 , < 4.20 (semver)
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Linux Linux Affected: 5.3
Unaffected: 0 , < 5.3 (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.77 , ≤ 6.12.* (semver)
Unaffected: 6.18.17 , ≤ 6.18.* (semver)
Unaffected: 6.19.7 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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    "dateReserved": "2026-01-13T15:37:45.992Z",
    "dateUpdated": "2026-05-23T16:04:30.234Z",
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This\\nfunction called filp_open(), following which these functions were called\\n(in reverse order), according to the call trace:\\n\\n  down_read\\n  __configfs_open_file\\n  do_dentry_open\\n  vfs_open\\n  do_open\\n  path_openat\\n  do_filp_open\\n  file_open_name\\n  filp_open\\n  target_core_item_dbroot_store\\n  flush_write_buffer\\n  configfs_write_iter\\n\\ntarget_core_item_dbroot_store() tries to validate the new file path by\\ntrying to open the file path provided to it; however, in this case, the bug\\nreport shows:\\n\\ndb_root: not a directory: /sys/kernel/config/target/dbroot\\n\\nindicating that the same configfs file was tried to be opened, on which it\\nis currently working on. Thus, it is trying to acquire frag_sem semaphore\\nof the same file of which it already holds the semaphore obtained in\\nflush_write_buffer(), leading to acquiring the semaphore in a nested manner\\nand a possibility of recursive locking.\\n\\nFix this by modifying target_core_item_dbroot_store() to use kern_path()\\ninstead of filp_open() to avoid opening the file using filesystem-specific\\nfunction __configfs_open_file(), and further modifying it to make this fix\\ncompatible.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\nscsi: target: Correcci\u00f3n de bloqueo recursivo en __configfs_open_file()\\n\\nEn flush_write_buffer, se adquiere \u0026amp;p-\u0026gt;frag_sem y luego se llama a la funci\u00f3n de almacenamiento cargada, que, aqu\u00ed, es target_core_item_dbroot_store(). Esta funci\u00f3n llam\u00f3 a filp_open(), tras lo cual se llamaron a estas funciones (en orden inverso), seg\u00fan el rastro de llamadas:\\n\\n  down_read\\n  __configfs_open_file\\n  do_dentry_open\\n  vfs_open\\n  do_open\\n  path_openat\\n  do_filp_open\\n  file_open_name\\n  filp_open\\n  target_core_item_dbroot_store\\n  flush_write_buffer\\n  configfs_write_iter\\n\\ntarget_core_item_dbroot_store() intenta validar la nueva ruta de archivo intentando abrir la ruta de archivo que se le proporcion\u00f3; sin embargo, en este caso, el informe de error muestra:\\n\\ndb_root: not a directory: /sys/kernel/config/target/dbroot\\n\\nindicando que se intent\u00f3 abrir el mismo archivo configfs, en el que est\u00e1 trabajando actualmente. 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  }
}


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