CVE-2021-47480

medium

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: core: Put LLD module refcnt after SCSI device is released SCSI host release is triggered when SCSI device is freed. We have to make sure that the low-level device driver module won't be unloaded before SCSI host instance is released because shost->hostt is required in the release handler. Make sure to put LLD module refcnt after SCSI device is released. Fixes a kernel panic of 'BUG: unable to handle page fault for address' reported by Changhui and Yi.

References

https://git.kernel.org/stable/c/f30822c0b4c35ec86187ab055263943dc71a6836

https://git.kernel.org/stable/c/f2b85040acec9a928b4eb1b57a989324e8e38d3f

https://git.kernel.org/stable/c/c2df161f69fb1c67f63adbd193368b47f511edc0

https://git.kernel.org/stable/c/8e4814a461787e15a31d322d9efbe0d4f6822428

https://git.kernel.org/stable/c/7b57c38d12aed1b5d92f74748bed25e0d041729f

https://git.kernel.org/stable/c/61a0faa89f21861d1f8d059123b5c285a5d9ffee

https://git.kernel.org/stable/c/1ce287eff9f23181d5644db787f472463a61f68b

https://git.kernel.org/stable/c/1105573d964f7b78734348466b01f5f6ba8a1813

Details

Source: Mitre, NVD

Published: 2024-05-22

Updated: 2024-05-22

Risk Information

CVSS v2

Base Score: 3.8

Vector: CVSS2#AV:L/AC:H/Au:S/C:N/I:N/A:C

Severity: Low

CVSS v3

Base Score: 4.7

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity: Medium