What is CVE-2021-47075?

CVE-2021-47075 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.3 out of 10, classified as a Memory Leak flaw (CWE-401), affecting Linux kernel versions from 5.7 onward and patched in 5.10.40, 5.12.7 and 5.13. CVE-2021-47075 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47075?

CVE-2021-47075 has a CVSS score of 5.3 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Is there a patch available for CVE-2021-47075?

Yes, CVE-2021-47075 has been patched. Fixed versions include 5.10.40, 5.12.7 and 5.13. If you are running Linux kernel 5.7 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47075 actively exploited?

CVE-2021-47075 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-2021-47075

Medium

In the Linux kernel, the following vulnerability has been resolved: nvmet: fix memory leak in nvmet_alloc_ctrl() When creating ctrl in nvmet_alloc_ctrl(), if the cntlid_min is larger than cntlid_max of the subsystem, and jumps to the "out_free_changed_ns_list" label, but the ctrl->sqs lack of be freed. Fix this by jumping to the "out_free_sqs" label.

Package Linux Kernel

Published 2024-03-01

Last modified 2025-03-19

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.3

out of 10

Medium

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

Low

Vector string

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weakness type

CWE-401

CVE-2021-47075 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 5.7 and later are affected. Fixed in 5.10.40, 5.12.7, 5.13 and their respective stable series.

Affected from

≥ 5.7

Fixed in

✓ 5.10.40 5.10.x ✓ 5.12.7 5.12.x ✓ 5.13

References

3 total

Kernel Git
https://git.kernel.org/stable/c/4720f29acb3fe67aa8aa71e6b675b079d193aaeb

Patch
Kernel Git
https://git.kernel.org/stable/c/afb680ed7ecbb7fd66ddb43650e9b533fd8b4b9a

Patch
Kernel Git
https://git.kernel.org/stable/c/fec356a61aa3d3a66416b4321f1279e09e0f256f

Patch

Details

CVE ID CVE-2021-47075

Severity Medium

CVSS score 5.3 / 10

CVSS version 3.1

Published 2024-03-01

Modified 2025-03-19

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47075?

CVE-2021-47075 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.3 out of 10 , classified as a Memory Leak flaw (CWE-401) . It affects Linux kernel versions from 5.7 onward and has been patched in 5.10.40, 5.12.7 and 5.13. CVE-2021-47075 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47075?

CVE-2021-47075 has a CVSS score of 5.3 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Is there a patch available for CVE-2021-47075?

Yes. CVE-2021-47075 has been patched. Fixed versions include 5.10.40, 5.12.7 and 5.13. If you are running Linux kernel 5.7 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47075 actively exploited?

No. CVE-2021-47075 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.