What is CVE-2021-47168?

CVE-2021-47168 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Out-of-bounds Write flaw (CWE-787), affecting Linux kernel versions from 2.6.37 onward and patched in 4.4.271, 4.9.271, 4.14.235 and others. CVE-2021-47168 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47168?

CVE-2021-47168 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-2021-47168?

Yes, CVE-2021-47168 has been patched. Fixed versions include 4.4.271, 4.9.271, 4.14.235 and others. If you are running Linux kernel 2.6.37 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47168 actively exploited?

CVE-2021-47168 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Out-of-bounds Write (CWE-787)?

The product writes data past the end or before the beginning of the intended buffer. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/787.html

CVE-2021-47168

Medium

In the Linux kernel, the following vulnerability has been resolved: NFS: fix an incorrect limit in filelayout_decode_layout() The "sizeof(struct nfs_fh)" is two bytes too large and could lead to memory corruption. It should be NFS_MAXFHSIZE because that's the size of the ->data[] buffer. I reversed the size of the arguments to put the variable on the left.

Package Linux Kernel

Published 2024-03-25

Last modified 2025-03-17

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-787

CVE-2021-47168 is a Out-of-bounds Write vulnerability

What is Out-of-bounds Write?

The product writes data past the end or before the beginning of the intended buffer. Learn more on MITRE CWE

Affected versions

Linux kernel versions 2.6.37 and later are affected. Fixed in 4.4.271, 4.9.271, 4.14.235, 4.19.193, 5.4.124, 5.10.42, 5.12.9, 5.13 and their respective stable series.

Affected from

≥ 2.6.37

Fixed in

✓ 4.4.271 4.4.x ✓ 4.9.271 4.9.x ✓ 4.14.235 4.14.x ✓ 4.19.193 4.19.x ✓ 5.4.124 5.4.x ✓ 5.10.42 5.10.x ✓ 5.12.9 5.12.x ✓ 5.13

References

8 total

Kernel Git
https://git.kernel.org/stable/c/769b01ea68b6c49dc3cde6adf7e53927dacbd3a8

Patch
Kernel Git
https://git.kernel.org/stable/c/945ebef997227ca8c20bad7f8a8358c8ee57a84a

Patch
Kernel Git
https://git.kernel.org/stable/c/9b367fe770b1b80d7bf64ed0d177544a44405f6e

Patch
Kernel Git
https://git.kernel.org/stable/c/9d280ab53df1d4a1043bd7a9e7c6a2f9cfbfe040

Patch
Kernel Git
https://git.kernel.org/stable/c/b287521e9e94bb342ebe5fd8c3fd7db9aef4e6f1

Patch

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2021-47168

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-03-25

Modified 2025-03-17

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47168?

CVE-2021-47168 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Out-of-bounds Write flaw (CWE-787) . It affects Linux kernel versions from 2.6.37 onward and has been patched in 4.4.271, 4.9.271, 4.14.235 and others. CVE-2021-47168 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47168?

CVE-2021-47168 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-2021-47168?

Yes. CVE-2021-47168 has been patched. Fixed versions include 4.4.271, 4.9.271, 4.14.235 and others. If you are running Linux kernel 2.6.37 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47168 actively exploited?

No. CVE-2021-47168 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.