CVE-2021-47258

MEDIUM

Linux Kernel < 4.9.273 - Use-After-Free in SCSI Host Device Initialization

Title source: llm
STIX 2.1

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: core: Fix error handling of scsi_host_alloc() After device is initialized via device_initialize(), or its name is set via dev_set_name(), the device has to be freed via put_device(). Otherwise device name will be leaked because it is allocated dynamically in dev_set_name(). Fix the leak by replacing kfree() with put_device(). Since scsi_host_dev_release() properly handles IDA and kthread removal, remove special-casing these from the error handling as well.

Scores

CVSS v3 5.5
EPSS 0.0024
EPSS Percentile 14.4%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-401
Status published
Products (18)
Linux/Linux < 2.6.30
Linux/Linux 1fa5ae857bb14f6046205171d98506d8112dd74e - 2dc85045ae65b9302a1d2e2ddd7ce4c030153a6a
Linux/Linux 1fa5ae857bb14f6046205171d98506d8112dd74e - 45d83db4728127944b237c0c8248987df9d478e7
Linux/Linux 1fa5ae857bb14f6046205171d98506d8112dd74e - 66a834d092930cf41d809c0e989b13cd6f9ca006
Linux/Linux 1fa5ae857bb14f6046205171d98506d8112dd74e - 79296e292d67fa7b5fb8d8c27343683e823872c8
Linux/Linux 1fa5ae857bb14f6046205171d98506d8112dd74e - 7a696ce1d5d16a33a6cd6400bbcc0339b2460e11
Linux/Linux 1fa5ae857bb14f6046205171d98506d8112dd74e - 8958181c1663e24a13434448e7d6b96b5d04900a
Linux/Linux 1fa5ae857bb14f6046205171d98506d8112dd74e - db08ce595dd64ea9859f7d088b51cbfc8e685c66
Linux/Linux 2.6.30
Linux/Linux 4.14.237 - 4.14.*
... and 8 more
Published May 21, 2024
Tracked Since Feb 18, 2026