What is CVE-2021-47205?

CVE-2021-47205 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 4.10 onward and patched in 5.15.5 and 5.16. CVE-2021-47205 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47205?

CVE-2021-47205 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-2021-47205?

Yes, CVE-2021-47205 has been patched. Fixed versions include 5.15.5 and 5.16. If you are running Linux kernel 4.10 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47205 actively exploited?

CVE-2021-47205 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-2021-47205

Medium

In the Linux kernel, the following vulnerability has been resolved: clk: sunxi-ng: Unregister clocks/resets when unbinding Currently, unbinding a CCU driver unmaps the device's MMIO region, while leaving its clocks/resets and their providers registered. This can cause a page fault later when some clock operation tries to perform MMIO. Fix this by separating the CCU initialization from the memory allocation, and then using a devres callback to unregister the clocks and resets. This also fixes a memory leak of the `struct ccu_reset`, and uses the correct owner (the specific platform driver) for the clocks and resets. Early OF clock providers are never unregistered, and limited error handling is possible, so they are mostly unchanged. The error reporting is made more consistent by moving the message inside of_sunxi_ccu_probe.

Package Linux Kernel

Published 2024-04-10

Last modified 2025-03-04

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-2021-47205 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 4.10 and later are affected. Fixed in 5.15.5, 5.16 and their respective stable series.

Affected from

≥ 4.10

Fixed in

✓ 5.15.5 5.15.x ✓ 5.16

References

2 total

Kernel Git
https://git.kernel.org/stable/c/9bec2b9c6134052994115d2d3374e96f2ccb9b9d

Mailing List Patch
Kernel Git
https://git.kernel.org/stable/c/b5dd513daa70ee8f6d281a20bd28485ee9bb7db2

Mailing List Patch

Details

CVE ID CVE-2021-47205

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-04-10

Modified 2025-03-04

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47205?

CVE-2021-47205 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 4.10 onward and has been patched in 5.15.5 and 5.16. CVE-2021-47205 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47205?

CVE-2021-47205 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-2021-47205?

Yes. CVE-2021-47205 has been patched. Fixed versions include 5.15.5 and 5.16. If you are running Linux kernel 4.10 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47205 actively exploited?

No. CVE-2021-47205 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.