CVE-2026-23032
Estado: AplazadaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
null_blk: fix kmemleak by releasing references to fault configfs items
When CONFIG_BLK_DEV_NULL_BLK_FAULT_INJECTION is enabled, the null-blk driver sets up fault injection support by creating the timeout_inject, requeue_inject, and init_hctx_fault_inject configfs items as children of the top-level nullbX configfs group.
However, when the nullbX device is removed, the references taken to these fault-config configfs items are not released. As a result, kmemleak reports a memory leak, for example:
Fix this by explicitly releasing the references to the fault-config configfs items when dropping the reference to the top-level nullbX configfs group.
Detalles técnicos trazas, registros y código del informe original
unreferenced object 0xc00000021ff25c40 (size 32):
comm "mkdir", pid 10665, jiffies 4322121578
hex dump (first 32 bytes):
69 6e 69 74 5f 68 63 74 78 5f 66 61 75 6c 74 5f init_hctx_fault_
69 6e 6a 65 63 74 00 88 00 00 00 00 00 00 00 00 inject..........
backtrace (crc 1a018c86):
__kmalloc_node_track_caller_noprof+0x494/0xbd8
kvasprintf+0x74/0xf4
config_item_set_name+0xf0/0x104
config_group_init_type_name+0x48/0xfc
fault_config_init+0x48/0xf0
0xc0080000180559e4
configfs_mkdir+0x304/0x814
vfs_mkdir+0x49c/0x604
do_mkdirat+0x314/0x3d0
sys_mkdir+0xa0/0xd8
system_call_exception+0x1b0/0x4f0
system_call_vectored_common+0x15c/0x2ecCVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.23%
- Percentil entre todas las CVEs puntuadas: 13
- 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)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
- https://git.kernel.org/stable/c/1a3286edf4d48ce37f8982ff3c3b65159a5ecbb2
- https://git.kernel.org/stable/c/40b94ec7edbbb867c4e26a1a43d2b898f04b93c5
- https://git.kernel.org/stable/c/d59ba448ccd595d5d65e197216cf781a87db2b28
- https://git.kernel.org/stable/c/f1718da051282698aa8fa150bebb9724f6389fda
- https://cert-portal.siemens.com/productcert/html/ssa-253495.html
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-23032",
"cveTags": [],
"metrics": {},
"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": "bb4c19e030f45c5416f1eb4daa94fbaf7165e9ea",
"lessThan": "1a3286edf4d48ce37f8982ff3c3b65159a5ecbb2",
"versionType": "git"
},
{
"status": "affected",
"version": "bb4c19e030f45c5416f1eb4daa94fbaf7165e9ea",
"lessThan": "d59ba448ccd595d5d65e197216cf781a87db2b28",
"versionType": "git"
},
{
"status": "affected",
"version": "bb4c19e030f45c5416f1eb4daa94fbaf7165e9ea",
"lessThan": "f1718da051282698aa8fa150bebb9724f6389fda",
"versionType": "git"
},
{
"status": "affected",
"version": "bb4c19e030f45c5416f1eb4daa94fbaf7165e9ea",
"lessThan": "40b94ec7edbbb867c4e26a1a43d2b898f04b93c5",
"versionType": "git"
}
],
"programFiles": [
"drivers/block/null_blk/main.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.4"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.122",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.67",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.7",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/block/null_blk/main.c"
],
"defaultStatus": "affected"
}
]
},
{
"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
"affectedData": [
{
"vendor": "Siemens",
"product": "RUGGEDCOM RST2428P",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "V4.0",
"versionType": "custom"
}
],
"defaultStatus": "unknown"
}
]
}
],
"published": "2026-01-31T12:16:06.513",
"references": [
{
"url": "https://git.kernel.org/stable/c/1a3286edf4d48ce37f8982ff3c3b65159a5ecbb2",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/40b94ec7edbbb867c4e26a1a43d2b898f04b93c5",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/d59ba448ccd595d5d65e197216cf781a87db2b28",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f1718da051282698aa8fa150bebb9724f6389fda",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-253495.html",
"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"
}
],
"vulnStatus": "Deferred",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnull_blk: fix kmemleak by releasing references to fault configfs items\n\nWhen CONFIG_BLK_DEV_NULL_BLK_FAULT_INJECTION is enabled, the null-blk\ndriver sets up fault injection support by creating the timeout_inject,\nrequeue_inject, and init_hctx_fault_inject configfs items as children\nof the top-level nullbX configfs group.\n\nHowever, when the nullbX device is removed, the references taken to\nthese fault-config configfs items are not released. As a result,\nkmemleak reports a memory leak, for example:\n\nunreferenced object 0xc00000021ff25c40 (size 32):\n comm \"mkdir\", pid 10665, jiffies 4322121578\n hex dump (first 32 bytes):\n 69 6e 69 74 5f 68 63 74 78 5f 66 61 75 6c 74 5f init_hctx_fault_\n 69 6e 6a 65 63 74 00 88 00 00 00 00 00 00 00 00 inject..........\n backtrace (crc 1a018c86):\n __kmalloc_node_track_caller_noprof+0x494/0xbd8\n kvasprintf+0x74/0xf4\n config_item_set_name+0xf0/0x104\n config_group_init_type_name+0x48/0xfc\n fault_config_init+0x48/0xf0\n 0xc0080000180559e4\n configfs_mkdir+0x304/0x814\n vfs_mkdir+0x49c/0x604\n do_mkdirat+0x314/0x3d0\n sys_mkdir+0xa0/0xd8\n system_call_exception+0x1b0/0x4f0\n system_call_vectored_common+0x15c/0x2ec\n\nFix this by explicitly releasing the references to the fault-config\nconfigfs items when dropping the reference to the top-level nullbX\nconfigfs group."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnull_blk: corrige kmemleak al liberar referencias a elementos configfs de fallo\n\nCuando CONFIG_BLK_DEV_NULL_BLK_FAULT_INJECTION está habilitado, el controlador null-blk configura el soporte de inyección de fallos al crear los elementos configfs timeout_inject, requeue_inject e init_hctx_fault_inject como hijos del grupo configfs nullbX de nivel superior.\n\nSin embargo, cuando se elimina el dispositivo nullbX, las referencias tomadas a estos elementos configfs de configuración de fallos no se liberan. Como resultado, kmemleak informa de una fuga de memoria, por ejemplo:\n\nobjeto sin referencia 0xc00000021ff25c40 (tamaño 32):\n comm 'mkdir', pid 10665, jiffies 4322121578\n volcado hexadecimal (primeros 32 bytes):\n 69 6e 69 74 5f 68 63 74 78 5f 66 61 75 6c 74 5f init_hctx_fault_\n 69 6e 6a 65 63 74 00 88 00 00 00 00 00 00 00 00 inject..........\n rastreo (crc 1a018c86):\n __kmalloc_node_track_caller_noprof+0x494/0xbd8\n kvasprintf+0x74/0xf4\n config_item_set_name+0xf0/0x104\n config_group_init_type_name+0x48/0xfc\n fault_config_init+0x48/0xf0\n 0xc0080000180559e4\n configfs_mkdir+0x304/0x814\n vfs_mkdir+0x49c/0x604\n do_mkdirat+0x314/0x3d0\n sys_mkdir+0xa0/0xd8\n system_call_exception+0x1b0/0x4f0\n system_call_vectored_common+0x15c/0x2ec\n\nSolucione esto liberando explícitamente las referencias a los elementos configfs de configuración de fallos al eliminar la referencia al grupo configfs nullbX de nivel superior."
}
],
"lastModified": "2026-06-17T10:20:44.747",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}