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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
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
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)
guessed Create a notification for this product.
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          {
            "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."
          },
          {
            "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. As\u00ed, est\u00e1 intentando adquirir el sem\u00e1foro frag_sem del mismo archivo del que ya posee el sem\u00e1foro obtenido en flush_write_buffer(), lo que lleva a adquirir el sem\u00e1foro de forma anidada y una posibilidad de bloqueo recursivo.\n\nSolucione esto modificando target_core_item_dbroot_store() para usar kern_path() en lugar de filp_open() para evitar abrir el archivo usando la funci\u00f3n espec\u00edfica del sistema de archivos __configfs_open_file(), y modific\u00e1ndolo a\u00fan m\u00e1s para hacer que esta correcci\u00f3n sea compatible."
          }
        ],
        "id": "CVE-2026-23292",
        "lastModified": "2026-06-17T10:21:16.180",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "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",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2026-03-25T11:16:24.357",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/142eacb50fb903a4c10dee7e67b6e79ebb36a582"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/14d4ac19d1895397532eec407433c5d74d9da53b"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/3161ef61f121d4573cad5b57c92188dcd9b284b3"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/4fcfa424a581d823cb1a9676e3eefe6ca17e453a"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/9a5641024fbfd9b24fe65984ad85fea10a3ae438"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/e8ef82cb6443d5f3260b1b830e17f03dda4229ea"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-674"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T11:39:50+00:00",
      "cve": "CVE-2026-23292",
      "id": "CVE-2026-23292",
      "initial_release_date": "2026-03-25T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: scsi: target: Fix recursive locking in __configfs_open_file()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23292.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T01:37:23Z",
      "cve": "CVE-2026-23292",
      "id": "CVE-2026-23292",
      "initial_release_date": "2026-03-25T16:57:04Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "697",
      "product_status:known_not_affected": "6",
      "product_status:recommended": "303",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-23292",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-23292.json",
      "version": "35"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.