What is CVE-2021-47138?

CVE-2021-47138 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10, classified as a Out-of-bounds Write flaw (CWE-787), affecting Linux kernel versions from 5.2 onward and patched in 5.4.124, 5.10.42, 5.12.9 and others. CVE-2021-47138 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47138?

CVE-2021-47138 has a CVSS score of 7.1 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:N/A:H.

Is there a patch available for CVE-2021-47138?

Yes, CVE-2021-47138 has been patched. Fixed versions include 5.4.124, 5.10.42, 5.12.9 and others. If you are running Linux kernel 5.2 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47138 actively exploited?

CVE-2021-47138 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-2021-47138

High

In the Linux kernel, the following vulnerability has been resolved: cxgb4: avoid accessing registers when clearing filters Hardware register having the server TID base can contain invalid values when adapter is in bad state (for example, due to AER fatal error). Reading these invalid values in the register can lead to out-of-bound memory access. So, fix by using the saved server TID base when clearing filters.

Package Linux Kernel

Published 2024-03-25

Last modified 2025-03-13

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.1

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-787

CVE-2021-47138 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 5.2 and later are affected. Fixed in 5.4.124, 5.10.42, 5.12.9, 5.13 and their respective stable series.

Affected from

≥ 5.2

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/02f03883fdb10ad7e66717c70ea163a8d27ae6e7

Patch
Kernel Git
https://git.kernel.org/stable/c/0bf49b3c8d8b3a43ce09f1b2db70e5484d31fcdf

Patch
Kernel Git
https://git.kernel.org/stable/c/285207a558ab456aa7d8aa877ecc7e91fcc51710

Patch
Kernel Git
https://git.kernel.org/stable/c/88c380df84fbd03f9b137c2b9d0a44b9f2f553b0

Patch

Details

CVE ID CVE-2021-47138

Severity High

CVSS score 7.1 / 10

CVSS version 3.1

Published 2024-03-25

Modified 2025-03-13

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47138?

CVE-2021-47138 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10 , classified as an Out-of-bounds Write flaw (CWE-787) . It affects Linux kernel versions from 5.2 onward and has been patched in 5.4.124, 5.10.42, 5.12.9 and others. CVE-2021-47138 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47138?

CVE-2021-47138 has a CVSS score of 7.1 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:N/A:H.
Is there a patch available for CVE-2021-47138?

Yes. CVE-2021-47138 has been patched. Fixed versions include 5.4.124, 5.10.42, 5.12.9 and others. If you are running Linux kernel 5.2 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47138 actively exploited?

No. CVE-2021-47138 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.