CVE-2021-47480

scsi: core: Put LLD module refcnt after SCSI device is released

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.

N/A

CVSS

Severity:

EPSS 0.11%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/1105573d964f7b78734348466b01f5f6ba8a1813
https://git.kernel.org/stable/c/8e4814a461787e15a31d322d9efbe0d4f6822428
https://git.kernel.org/stable/c/61a0faa89f21861d1f8d059123b5c285a5d9ffee
https://git.kernel.org/stable/c/c2df161f69fb1c67f63adbd193368b47f511edc0
https://git.kernel.org/stable/c/1ce287eff9f23181d5644db787f472463a61f68b
https://git.kernel.org/stable/c/7b57c38d12aed1b5d92f74748bed25e0d041729f
https://git.kernel.org/stable/c/f30822c0b4c35ec86187ab055263943dc71a6836
https://git.kernel.org/stable/c/f2b85040acec9a928b4eb1b57a989324e8e38d3f

Frequently Asked Questions

What is the severity of CVE-2021-47480?: CVE-2021-47480 has not yet been assigned a CVSS score.
How to fix CVE-2021-47480?: To fix CVE-2021-47480, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-47480 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-47480 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-47480?: CVE-2021-47480 affects Linux Linux, Linux Linux.

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