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CVE-2022-49376

Estado: ModificadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

scsi: sd: Fix potential NULL pointer dereference

If sd_probe() sees an early error before sdkp->device is initialized, sd_zbc_release_disk() is called. This causes a NULL pointer dereference when sd_is_zoned() is called inside that function. Avoid this by removing the call to sd_zbc_release_disk() in sd_probe() error path.

This change is safe and does not result in zone information memory leakage because the zone information for a zoned disk is allocated only when sd_revalidate_disk() is called, at which point sdkp->disk_dev is fully set, resulting in sd_disk_release() being called when needed to cleanup a disk zone information using sd_zbc_release_disk().

CVSS

Probabilidad de explotación (EPSS)

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)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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          "version": "2.0.3",
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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: sd: Fix potential NULL pointer dereference\n\nIf sd_probe() sees an early error before sdkp->device is initialized,\nsd_zbc_release_disk() is called. This causes a NULL pointer dereference\nwhen sd_is_zoned() is called inside that function. Avoid this by removing\nthe call to sd_zbc_release_disk() in sd_probe() error path.\n\nThis change is safe and does not result in zone information memory leakage\nbecause the zone information for a zoned disk is allocated only when\nsd_revalidate_disk() is called, at which point sdkp->disk_dev is fully set,\nresulting in sd_disk_release() being called when needed to cleanup a disk\nzone information using sd_zbc_release_disk()."
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      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: scsi: sd: Se corrige una posible desreferencia de puntero NULL Si sd_probe() detecta un error temprano antes de que se inicialice sdkp->device, se llama a sd_zbc_release_disk(). Esto provoca una desreferencia de puntero NULL cuando se llama a sd_is_zoned() dentro de esa función. Evite esto eliminando la llamada a sd_zbc_release_disk() en la ruta de error de sd_probe(). Este cambio es seguro y no da como resultado una pérdida de memoria de información de zona porque la información de zona para un disco zonificado se asigna solo cuando se llama a sd_revalidate_disk(), momento en el que sdkp->disk_dev está completamente configurado, lo que da como resultado que se llame a sd_disk_release() cuando sea necesario para limpiar la información de zona de un disco mediante sd_zbc_release_disk()."
    }
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  "lastModified": "2026-06-17T05:17:52.310",
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