CVE-2026-23292
Estado: AnalizadaMedia (5.5)—
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:
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
Leer descripción completaMostrar menos
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.
Detalles técnicos trazas, registros y código del informe original
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
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.12%
- Percentil entre todas las CVEs puntuadas: 2
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- CWE-674
Referencias
- https://git.kernel.org/stable/c/142eacb50fb903a4c10dee7e67b6e79ebb36a582
- https://git.kernel.org/stable/c/14d4ac19d1895397532eec407433c5d74d9da53b
- https://git.kernel.org/stable/c/3161ef61f121d4573cad5b57c92188dcd9b284b3
- https://git.kernel.org/stable/c/4fcfa424a581d823cb1a9676e3eefe6ca17e453a
- https://git.kernel.org/stable/c/9a5641024fbfd9b24fe65984ad85fea10a3ae438
- https://git.kernel.org/stable/c/e8ef82cb6443d5f3260b1b830e17f03dda4229ea
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-23292",
"cveTags": [],
"metrics": {
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 5.5,
"attackVector": "LOCAL",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 1.8
}
]
},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "b0841eefd9693827afb9888235e26ddd098f9cef",
"lessThan": "3161ef61f121d4573cad5b57c92188dcd9b284b3",
"versionType": "git"
},
{
"status": "affected",
"version": "b0841eefd9693827afb9888235e26ddd098f9cef",
"lessThan": "e8ef82cb6443d5f3260b1b830e17f03dda4229ea",
"versionType": "git"
},
{
"status": "affected",
"version": "b0841eefd9693827afb9888235e26ddd098f9cef",
"lessThan": "4fcfa424a581d823cb1a9676e3eefe6ca17e453a",
"versionType": "git"
},
{
"status": "affected",
"version": "b0841eefd9693827afb9888235e26ddd098f9cef",
"lessThan": "9a5641024fbfd9b24fe65984ad85fea10a3ae438",
"versionType": "git"
},
{
"status": "affected",
"version": "b0841eefd9693827afb9888235e26ddd098f9cef",
"lessThan": "142eacb50fb903a4c10dee7e67b6e79ebb36a582",
"versionType": "git"
},
{
"status": "affected",
"version": "b0841eefd9693827afb9888235e26ddd098f9cef",
"lessThan": "14d4ac19d1895397532eec407433c5d74d9da53b",
"versionType": "git"
},
{
"status": "affected",
"version": "49824b5c875087a52672b0c8e8ecbefe6f773532",
"versionType": "git"
},
{
"status": "affected",
"version": "09e21253d17f53bdb5aac0e0dbd057a29fcbe8d1",
"versionType": "git"
},
{
"status": "affected",
"version": "0dfc45be875a378c2a3a4d6ed8e668ec8eb75073",
"versionType": "git"
},
{
"status": "affected",
"version": "4.9.201",
"lessThan": "4.10",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.14.154",
"lessThan": "4.15",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.19.84",
"lessThan": "4.20",
"versionType": "semver"
}
],
"programFiles": [
"drivers/target/target_core_configfs.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.3"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.3",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.167",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.130",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.77",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.17",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.7",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/target/target_core_configfs.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-03-25T11:16:24.357",
"references": [
{
"url": "https://git.kernel.org/stable/c/142eacb50fb903a4c10dee7e67b6e79ebb36a582",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/14d4ac19d1895397532eec407433c5d74d9da53b",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/3161ef61f121d4573cad5b57c92188dcd9b284b3",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/4fcfa424a581d823cb1a9676e3eefe6ca17e453a",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/9a5641024fbfd9b24fe65984ad85fea10a3ae438",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/e8ef82cb6443d5f3260b1b830e17f03dda4229ea",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-674"
}
]
}
],
"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, &p->frag_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: Corrección de bloqueo recursivo en __configfs_open_file()\n\nEn flush_write_buffer, se adquiere &p->frag_sem y luego se llama a la función de almacenamiento cargada, que, aquí, es target_core_item_dbroot_store(). Esta función llamó a filp_open(), tras lo cual se llamaron a estas funciones (en orden inverso), según 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 proporcionó; 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 intentó abrir el mismo archivo configfs, en el que está trabajando actualmente. Así, está intentando adquirir el semáforo frag_sem del mismo archivo del que ya posee el semáforo obtenido en flush_write_buffer(), lo que lleva a adquirir el semáforo 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 función específica del sistema de archivos __configfs_open_file(), y modificándolo aún más para hacer que esta corrección sea compatible."
}
],
"lastModified": "2026-06-17T10:21:16.180",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "98FE002B-FFEB-420A-9E67-5E04854D1169",
"versionEndExcluding": "4.10",
"versionStartIncluding": "4.9.201"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "344FEFB4-E393-4E04-905A-4734AC267EC1",
"versionEndExcluding": "4.15",
"versionStartIncluding": "4.14.154"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B7EACEB9-7173-47F4-83A4-AE06CE74D78B",
"versionEndExcluding": "4.20",
"versionStartIncluding": "4.19.84"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "761FF490-ED98-4C4D-998C-6CFBB8D2B911",
"versionEndExcluding": "6.1.167",
"versionStartIncluding": "5.3.1"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "C57BB918-DF28-46B3-94F7-144176841267",
"versionEndExcluding": "6.6.130",
"versionStartIncluding": "6.2"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B3D12E00-E42D-4056-B354-BAD4903C03A5",
"versionEndExcluding": "6.12.77",
"versionStartIncluding": "6.7"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A5E006E4-59C7-43C1-9231-62A72219F2BA",
"versionEndExcluding": "6.18.17",
"versionStartIncluding": "6.13"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "69245D10-0B71-485E-80C3-A64F077004D3",
"versionEndExcluding": "6.19.7",
"versionStartIncluding": "6.19"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:5.3:-:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D036D76E-AC69-4382-B4C1-8EDA1ABB2941"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:5.3:rc8:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "999345BA-F820-40B9-A711-32CA9265C289"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}