What is CVE-2021-47289?

CVE-2021-47289 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 5.2 onward and patched in 5.4.139, 5.10.57, 5.13.6 and others. CVE-2021-47289 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47289?

CVE-2021-47289 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-2021-47289?

Yes, CVE-2021-47289 has been patched. Fixed versions include 5.4.139, 5.10.57, 5.13.6 and others. If you are running Linux kernel 5.2 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47289 actively exploited?

CVE-2021-47289 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-2021-47289

Medium

In the Linux kernel, the following vulnerability has been resolved: ACPI: fix NULL pointer dereference Commit 71f642833284 ("ACPI: utils: Fix reference counting in for_each_acpi_dev_match()") started doing "acpi_dev_put()" on a pointer that was possibly NULL. That fails miserably, because that helper inline function is not set up to handle that case. Just make acpi_dev_put() silently accept a NULL pointer, rather than calling down to put_device() with an invalid offset off that NULL pointer.

Package Linux Kernel

Published 2024-05-21

Last modified 2024-12-23

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-2021-47289 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 5.2 and later are affected. Fixed in 5.4.139, 5.10.57, 5.13.6, 5.14 and their respective stable series.

Affected from

≥ 5.2

Fixed in

✓ 5.4.139 5.4.x ✓ 5.10.57 5.10.x ✓ 5.13.6 5.13.x ✓ 5.14

References

4 total

Kernel Git
https://git.kernel.org/stable/c/38f54217b423c0101d03a00feec6fb8ec608b12e

Patch
Kernel Git
https://git.kernel.org/stable/c/cae3fa3d8165761f3000f523b11cfa1cd35206bc

Patch
Kernel Git
https://git.kernel.org/stable/c/ccf23a0888077a25a0793a746c3941db2a7562e4

Patch
Kernel Git
https://git.kernel.org/stable/c/fc68f42aa737dc15e7665a4101d4168aadb8e4c4

Patch

Details

CVE ID CVE-2021-47289

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-05-21

Modified 2024-12-23

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47289?

CVE-2021-47289 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 5.2 onward and has been patched in 5.4.139, 5.10.57, 5.13.6 and others. CVE-2021-47289 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47289?

CVE-2021-47289 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-2021-47289?

Yes. CVE-2021-47289 has been patched. Fixed versions include 5.4.139, 5.10.57, 5.13.6 and others. If you are running Linux kernel 5.2 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47289 actively exploited?

No. CVE-2021-47289 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.