What is CVE-2021-47480?

CVE-2021-47480 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 2.6.16 onward and patched in 4.4.292, 4.9.290, 4.14.255 and others. CVE-2021-47480 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47480?

CVE-2021-47480 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2021-47480?

Yes, CVE-2021-47480 has been patched. Fixed versions include 4.4.292, 4.9.290, 4.14.255 and others. If you are running Linux kernel 2.6.16 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47480 actively exploited?

CVE-2021-47480 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47480

Medium

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.

Package Linux Kernel

Published 2024-05-22

Last modified 2025-09-29

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected versions

Linux kernel versions 2.6.16 and later are affected. Fixed in 4.4.292, 4.9.290, 4.14.255, 4.19.216, 5.4.158, 5.10.78, 5.14.17, 5.15 and their respective stable series.

Affected from

≥ 2.6.16

Fixed in

✓ 4.4.292 4.4.x ✓ 4.9.290 4.9.x ✓ 4.14.255 4.14.x ✓ 4.19.216 4.19.x ✓ 5.4.158 5.4.x ✓ 5.10.78 5.10.x ✓ 5.14.17 5.14.x ✓ 5.15

References

8 total

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

Patch
Kernel Git
https://git.kernel.org/stable/c/1ce287eff9f23181d5644db787f472463a61f68b

Patch
Kernel Git
https://git.kernel.org/stable/c/61a0faa89f21861d1f8d059123b5c285a5d9ffee

Patch
Kernel Git
https://git.kernel.org/stable/c/7b57c38d12aed1b5d92f74748bed25e0d041729f

Patch
Kernel Git
https://git.kernel.org/stable/c/8e4814a461787e15a31d322d9efbe0d4f6822428

Patch

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2021-47480

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-05-22

Modified 2025-09-29

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47480?

CVE-2021-47480 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 2.6.16 onward and has been patched in 4.4.292, 4.9.290, 4.14.255 and others. CVE-2021-47480 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47480?

CVE-2021-47480 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2021-47480?

Yes. CVE-2021-47480 has been patched. Fixed versions include 4.4.292, 4.9.290, 4.14.255 and others. If you are running Linux kernel 2.6.16 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47480 actively exploited?

No. CVE-2021-47480 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.