CVE-2021-27363

Estado: ModificadaMedia (4.4)—

An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the iSCSI subsystem, the transport's handle is available to unprivileged users via the sysfs file system, at /sys/class/iscsi_transport/$TRANSPORT_NAME/handle. When read, the show_transport_handle function (in drivers/scsi/scsi_transport_iscsi.c) is called, which leaks the handle. This handle is actually the pointer to an iscsi_transport struct in the kernel module's global variables.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
Puntuación base: 4.4

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.71%
Percentil entre todas las CVEs puntuadas: 52
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 (4)

Debian — Debian Linux Linux — Linux Kernel Netapp — Cloud Backup Netapp — Solidfire Baseboard Management Controller Firmware

CWE

NVD-CWE-noinfo

Referencias

JSON original (NVD)

Mostrar

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      "value": "An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the iSCSI subsystem, the transport's handle is available to unprivileged users via the sysfs file system, at /sys/class/iscsi_transport/$TRANSPORT_NAME/handle. When read, the show_transport_handle function (in drivers/scsi/scsi_transport_iscsi.c) is called, which leaks the handle. This handle is actually the pointer to an iscsi_transport struct in the kernel module's global variables."
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      "value": "Se detectó un problema en el kernel de Linux versiones hasta 5.11.3.&#xa0;Se puede usar un filtrado del puntero del kernel para determinar la dirección de la estructura iscsi_transport.&#xa0;Cuando se registra un transporte iSCSI con el subsistema iSCSI, el handle de transporte está disponible para usuarios sin privilegios por medio del sistema de archivos sysfs, en /sys/class/iscsi_transport/$TRANSPORT_NAME/handle.&#xa0;Cuando se lee, se llama a la función show_transport_handle (en el archivo drivers/scsi/scsi_transport_iscsi.c), que filtra el handle.&#xa0;Este handle es en realidad el puntero a una estructura iscsi_transport en las variables globales del módulo del kernel"
    }
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  "lastModified": "2026-06-17T03:44:42.647",
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