What is CVE-2021-47120?

CVE-2021-47120 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476), affecting Linux kernel versions from 4.20 onward and patched in 5.4.125, 5.10.43, 5.12.10 and others. CVE-2021-47120 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47120?

CVE-2021-47120 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-2021-47120?

Yes, CVE-2021-47120 has been patched. Fixed versions include 5.4.125, 5.10.43, 5.12.10 and others. If you are running Linux kernel 4.20 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47120 actively exploited?

CVE-2021-47120 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/476.html

CVE-2021-47120

Medium

In the Linux kernel, the following vulnerability has been resolved: HID: magicmouse: fix NULL-deref on disconnect Commit 9d7b18668956 ("HID: magicmouse: add support for Apple Magic Trackpad 2") added a sanity check for an Apple trackpad but returned success instead of -ENODEV when the check failed. This means that the remove callback will dereference the never-initialised driver data pointer when the driver is later unbound (e.g. on USB disconnect).

Package Linux Kernel

Published 2024-03-15

Last modified 2025-01-07

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-476

CVE-2021-47120 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

Affected versions

Linux kernel versions 4.20 and later are affected. Fixed in 5.4.125, 5.10.43, 5.12.10, 5.13 and their respective stable series.

Affected from

≥ 4.20

Fixed in

✓ 5.4.125 5.4.x ✓ 5.10.43 5.10.x ✓ 5.12.10 5.12.x ✓ 5.13

References

4 total

Kernel Git
https://git.kernel.org/stable/c/368c5d45a87e1bcc7f1e98e0c255c37b7b12c5d6

Patch
Kernel Git
https://git.kernel.org/stable/c/4b4f6cecca446abcb686c6e6c451d4f1ec1a7497

Patch
Kernel Git
https://git.kernel.org/stable/c/9cf27473f21913a3eaf4702dd2a25415afd5f33f

Patch
Kernel Git
https://git.kernel.org/stable/c/b5d013c4c76b276890135b5d32803c4c63924b77

Patch

Details

CVE ID CVE-2021-47120

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-03-15

Modified 2025-01-07

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47120?

CVE-2021-47120 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . It affects Linux kernel versions from 4.20 onward and has been patched in 5.4.125, 5.10.43, 5.12.10 and others. CVE-2021-47120 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47120?

CVE-2021-47120 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-2021-47120?

Yes. CVE-2021-47120 has been patched. Fixed versions include 5.4.125, 5.10.43, 5.12.10 and others. If you are running Linux kernel 4.20 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47120 actively exploited?

No. CVE-2021-47120 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.