What is CVE-2021-47143?

CVE-2021-47143 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 4.19 onward and patched in 5.10.42, 5.12.9 and 5.13. CVE-2021-47143 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47143?

CVE-2021-47143 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-2021-47143?

Yes, CVE-2021-47143 has been patched. Fixed versions include 5.10.42, 5.12.9 and 5.13. If you are running Linux kernel 4.19 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47143 actively exploited?

CVE-2021-47143 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47143

Medium

In the Linux kernel, the following vulnerability has been resolved: net/smc: remove device from smcd_dev_list after failed device_add() If the device_add() for a smcd_dev fails, there's no cleanup step that rolls back the earlier list_add(). The device subsequently gets freed, and we end up with a corrupted list. Add some error handling that removes the device from the list.

Package Linux Kernel

Published 2024-03-25

Last modified 2025-03-13

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

Weakness type

CWE-459

CVE-2021-47143 is classified as CWE-459

See CWE-459 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 4.19 and later are affected. Fixed in 5.10.42, 5.12.9, 5.13 and their respective stable series.

Affected from

≥ 4.19

Fixed in

✓ 5.10.42 5.10.x ✓ 5.12.9 5.12.x ✓ 5.13

References

3 total

Kernel Git
https://git.kernel.org/stable/c/40588782f1016c655ae1d302892f61d35af96842

Patch
Kernel Git
https://git.kernel.org/stable/c/444d7be9532dcfda8e0385226c862fd7e986f607

Patch
Kernel Git
https://git.kernel.org/stable/c/8b2cdc004d21a7255f219706dca64411108f7897

Patch

Details

CVE ID CVE-2021-47143

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-03-25

Modified 2025-03-13

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47143?

CVE-2021-47143 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 4.19 onward and has been patched in 5.10.42, 5.12.9 and 5.13. CVE-2021-47143 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47143?

CVE-2021-47143 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-2021-47143?

Yes. CVE-2021-47143 has been patched. Fixed versions include 5.10.42, 5.12.9 and 5.13. If you are running Linux kernel 4.19 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47143 actively exploited?

No. CVE-2021-47143 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.