CVE-2026-23292 (GCVE-0-2026-23292)
Vulnerability from cvelistv5
Published
2026-03-25 10:26
Modified
2026-04-13 06:03
Severity ?
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: b0841eefd9693827afb9888235e26ddd098f9cef
Version: b0841eefd9693827afb9888235e26ddd098f9cef
Version: b0841eefd9693827afb9888235e26ddd098f9cef
Version: b0841eefd9693827afb9888235e26ddd098f9cef
Version: b0841eefd9693827afb9888235e26ddd098f9cef
Version: b0841eefd9693827afb9888235e26ddd098f9cef
Version: 49824b5c875087a52672b0c8e8ecbefe6f773532
Version: 09e21253d17f53bdb5aac0e0dbd057a29fcbe8d1
Version: 0dfc45be875a378c2a3a4d6ed8e668ec8eb75073
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{
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: Fix recursive locking in __configfs_open_file()\n\nIn flush_write_buffer, \u0026p-\u003efrag_sem is acquired and then the loaded store\nfunction is called, which, here, is target_core_item_dbroot_store().  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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-13T06:03:45.806Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3161ef61f121d4573cad5b57c92188dcd9b284b3"
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          "url": "https://git.kernel.org/stable/c/e8ef82cb6443d5f3260b1b830e17f03dda4229ea"
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        },
        {
          "url": "https://git.kernel.org/stable/c/14d4ac19d1895397532eec407433c5d74d9da53b"
        }
      ],
      "title": "scsi: target: Fix recursive locking in __configfs_open_file()",
      "x_generator": {
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23292",
    "datePublished": "2026-03-25T10:26:50.408Z",
    "dateReserved": "2026-01-13T15:37:45.992Z",
    "dateUpdated": "2026-04-13T06:03:45.806Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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