CVE-2021-47480

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

State: Published
Severity: Not scored
Published: May 22, 2024
Updated: May 11, 2026
Reserved: May 22, 2024

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	65110b2168950a19cc78b5027ed18cb811fbdae8 to before 1105573d964f7b78734348466b01f5f6ba8a1813Affected 65110b2168950a19cc78b5027ed18cb811fbdae8 to before 8e4814a461787e15a31d322d9efbe0d4f6822428Affected 65110b2168950a19cc78b5027ed18cb811fbdae8 to before 61a0faa89f21861d1f8d059123b5c285a5d9ffeeAffected 65110b2168950a19cc78b5027ed18cb811fbdae8 to before c2df161f69fb1c67f63adbd193368b47f511edc0Affected 65110b2168950a19cc78b5027ed18cb811fbdae8 to before 1ce287eff9f23181d5644db787f472463a61f68bAffected 65110b2168950a19cc78b5027ed18cb811fbdae8 to before 7b57c38d12aed1b5d92f74748bed25e0d041729fAffected 65110b2168950a19cc78b5027ed18cb811fbdae8 to before f30822c0b4c35ec86187ab055263943dc71a6836Affected 65110b2168950a19cc78b5027ed18cb811fbdae8 to before f2b85040acec9a928b4eb1b57a989324e8e38d3fAffected
LinuxLinux	2.6.16Affected before 2.6.16Not affected 4.4.292 through 4.4.Not affected 4.9.290 through 4.9.Not affected 4.14.255 through 4.14.Not affected 4.19.216 through 4.19.Not affected 5.4.158 through 5.4.Not affected 5.10.78 through 5.10.Not affected 5.14.17 through 5.14.*Not affected 5.15 and laterNot affected

Product

Versions

LinuxLinux

65110b2168950a19cc78b5027ed18cb811fbdae8 to before 1105573d964f7b78734348466b01f5f6ba8a1813Affected
65110b2168950a19cc78b5027ed18cb811fbdae8 to before 8e4814a461787e15a31d322d9efbe0d4f6822428Affected
65110b2168950a19cc78b5027ed18cb811fbdae8 to before 61a0faa89f21861d1f8d059123b5c285a5d9ffeeAffected
65110b2168950a19cc78b5027ed18cb811fbdae8 to before c2df161f69fb1c67f63adbd193368b47f511edc0Affected
65110b2168950a19cc78b5027ed18cb811fbdae8 to before 1ce287eff9f23181d5644db787f472463a61f68bAffected
65110b2168950a19cc78b5027ed18cb811fbdae8 to before 7b57c38d12aed1b5d92f74748bed25e0d041729fAffected
65110b2168950a19cc78b5027ed18cb811fbdae8 to before f30822c0b4c35ec86187ab055263943dc71a6836Affected
65110b2168950a19cc78b5027ed18cb811fbdae8 to before f2b85040acec9a928b4eb1b57a989324e8e38d3fAffected

LinuxLinux

2.6.16Affected
before 2.6.16Not affected
4.4.292 through 4.4.*Not affected
4.9.290 through 4.9.*Not affected
4.14.255 through 4.14.*Not affected
4.19.216 through 4.19.*Not affected
5.4.158 through 5.4.*Not affected
5.10.78 through 5.10.*Not affected
5.14.17 through 5.14.*Not affected
5.15 and laterNot affected

References

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