What is CVE-2021-47425?

CVE-2021-47425 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Memory Leak flaw (CWE-401), affecting Linux kernel versions from 4.8 onward and patched in 4.14.251, 4.19.211, 5.4.153 and others. CVE-2021-47425 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47425?

CVE-2021-47425 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-2021-47425?

Yes, CVE-2021-47425 has been patched. Fixed versions include 4.14.251, 4.19.211, 5.4.153 and others. If you are running Linux kernel 4.8 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47425 actively exploited?

CVE-2021-47425 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Memory Leak (CWE-401)?

The product does not release memory after use, causing gradual resource exhaustion. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/401.html

CVE-2021-47425

Medium

In the Linux kernel, the following vulnerability has been resolved: i2c: acpi: fix resource leak in reconfiguration device addition acpi_i2c_find_adapter_by_handle() calls bus_find_device() which takes a reference on the adapter which is never released which will result in a reference count leak and render the adapter unremovable. Make sure to put the adapter after creating the client in the same manner that we do for OF. [wsa: fixed title]

Package Linux Kernel

Published 2024-05-21

Last modified 2025-09-23

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-401

CVE-2021-47425 is a Memory Leak vulnerability

What is Memory Leak?

The product does not release memory after use, causing gradual resource exhaustion. Learn more on MITRE CWE

Affected versions

Linux kernel versions 4.8 and later are affected. Fixed in 4.14.251, 4.19.211, 5.4.153, 5.10.73, 5.14.12, 5.15 and their respective stable series.

Affected from

≥ 4.8

Fixed in

✓ 4.14.251 4.14.x ✓ 4.19.211 4.19.x ✓ 5.4.153 5.4.x ✓ 5.10.73 5.10.x ✓ 5.14.12 5.14.x ✓ 5.15

References

6 total

Kernel Git
https://git.kernel.org/stable/c/3d9d458a8aaafa47268ea4f1b4114a9f12927989

Patch
Kernel Git
https://git.kernel.org/stable/c/60bacf259e8c2eb2324f3e13275200baaee9494b

Patch
Kernel Git
https://git.kernel.org/stable/c/6558b646ce1c2a872fe1c2c7cb116f05a2c1950f

Patch
Kernel Git
https://git.kernel.org/stable/c/90f1077c9184ec2ae9989e4642f211263f301694

Patch
Kernel Git
https://git.kernel.org/stable/c/b8090a84d7758b929d348bafbd86bb7a10c5fb63

Patch

Showing 5 of 6 references View all on NVD

Details

CVE ID CVE-2021-47425

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-05-21

Modified 2025-09-23

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47425?

CVE-2021-47425 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a Memory Leak flaw (CWE-401) . It affects Linux kernel versions from 4.8 onward and has been patched in 4.14.251, 4.19.211, 5.4.153 and others. CVE-2021-47425 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47425?

CVE-2021-47425 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-2021-47425?

Yes. CVE-2021-47425 has been patched. Fixed versions include 4.14.251, 4.19.211, 5.4.153 and others. If you are running Linux kernel 4.8 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47425 actively exploited?

No. CVE-2021-47425 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.