What is CVE-2021-47137?

CVE-2021-47137 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 4.20 onward and patched in 5.4.124, 5.10.42, 5.12.9 and others. CVE-2021-47137 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47137?

CVE-2021-47137 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2021-47137?

Yes, CVE-2021-47137 has been patched. Fixed versions include 5.4.124, 5.10.42, 5.12.9 and others. If you are running Linux kernel 4.20 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47137 actively exploited?

CVE-2021-47137 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47137

High

In the Linux kernel, the following vulnerability has been resolved: net: lantiq: fix memory corruption in RX ring In a situation where memory allocation or dma mapping fails, an invalid address is programmed into the descriptor. This can lead to memory corruption. If the memory allocation fails, DMA should reuse the previous skb and mapping and drop the packet. This patch also increments rx drop counter.

Package Linux Kernel

Published 2024-03-25

Last modified 2025-03-19

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-770

CVE-2021-47137 is classified as CWE-770

See CWE-770 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 4.20 and later are affected. Fixed in 5.4.124, 5.10.42, 5.12.9, 5.13 and their respective stable series.

Affected from

≥ 4.20

Fixed in

✓ 5.4.124 5.4.x ✓ 5.10.42 5.10.x ✓ 5.12.9 5.12.x ✓ 5.13

References

4 total

Kernel Git
https://git.kernel.org/stable/c/46dd4abced3cb2c912916f4a5353e0927db0c4a2

Patch
Kernel Git
https://git.kernel.org/stable/c/5ac72351655f8b033a2935646f53b7465c903418

Patch
Kernel Git
https://git.kernel.org/stable/c/8bb1077448d43a871ed667520763e3b9f9b7975d

Patch
Kernel Git
https://git.kernel.org/stable/c/c7718ee96dbc2f9c5fc3b578abdf296dd44b9c20

Patch

Details

CVE ID CVE-2021-47137

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-03-25

Modified 2025-03-19

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47137?

CVE-2021-47137 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 4.20 onward and has been patched in 5.4.124, 5.10.42, 5.12.9 and others. CVE-2021-47137 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47137?

CVE-2021-47137 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2021-47137?

Yes. CVE-2021-47137 has been patched. Fixed versions include 5.4.124, 5.10.42, 5.12.9 and others. If you are running Linux kernel 4.20 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47137 actively exploited?

No. CVE-2021-47137 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.