What is CVE-2021-47347?

CVE-2021-47347 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10, affecting Linux kernel versions from 2.6.31 onward and patched in 4.4.276, 4.9.276, 4.14.240 and others. CVE-2021-47347 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47347?

CVE-2021-47347 has a CVSS score of 8.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2021-47347?

Yes, CVE-2021-47347 has been patched. Fixed versions include 4.4.276, 4.9.276, 4.14.240 and others. If you are running Linux kernel 2.6.31 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47347 actively exploited?

CVE-2021-47347 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47347

High

In the Linux kernel, the following vulnerability has been resolved: wl1251: Fix possible buffer overflow in wl1251_cmd_scan Function wl1251_cmd_scan calls memcpy without checking the length. Harden by checking the length is within the maximum allowed size.

Package Linux Kernel

Published 2024-05-21

Last modified 2025-04-02

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

8.8

out of 10

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-120

CVE-2021-47347 is classified as CWE-120

See CWE-120 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 2.6.31 and later are affected. Fixed in 4.4.276, 4.9.276, 4.14.240, 4.19.198, 5.4.133, 5.10.51, 5.12.18, 5.13.3, 5.14 and their respective stable series.

Affected from

≥ 2.6.31

Fixed in

✓ 4.4.276 4.4.x ✓ 4.9.276 4.9.x ✓ 4.14.240 4.14.x ✓ 4.19.198 4.19.x ✓ 5.4.133 5.4.x ✓ 5.10.51 5.10.x ✓ 5.12.18 5.12.x ✓ 5.13.3 5.13.x ✓ 5.14

References

9 total

Kernel Git
https://git.kernel.org/stable/c/0f6c0488368c9ac1aa685821916fadba32f5d1ef

Patch
Kernel Git
https://git.kernel.org/stable/c/115103f6e3f1c26c473766c16439c7c8b235529a

Patch
Kernel Git
https://git.kernel.org/stable/c/302e2ee34c5f7c5d805b7f835d9a6f2b43474e2a

Patch
Kernel Git
https://git.kernel.org/stable/c/40af3960a15339e8bbd3be50c3bc7b35e1a0b6ea

Patch
Kernel Git
https://git.kernel.org/stable/c/57ad99ae3c6738ba87bad259bb57c641ca68ebf6

Patch

Showing 5 of 9 references View all on NVD

Details

CVE ID CVE-2021-47347

Severity High

CVSS score 8.8 / 10

CVSS version 3.1

Published 2024-05-21

Modified 2025-04-02

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47347?

CVE-2021-47347 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10 . It affects Linux kernel versions from 2.6.31 onward and has been patched in 4.4.276, 4.9.276, 4.14.240 and others. CVE-2021-47347 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47347?

CVE-2021-47347 has a CVSS score of 8.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2021-47347?

Yes. CVE-2021-47347 has been patched. Fixed versions include 4.4.276, 4.9.276, 4.14.240 and others. If you are running Linux kernel 2.6.31 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47347 actively exploited?

No. CVE-2021-47347 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.