What is CVE-2021-47286?

CVE-2021-47286 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Out-of-bounds Write flaw (CWE-787), affecting Linux kernel versions from 5.7 onward and patched in 5.10.54, 5.13.6 and 5.14. CVE-2021-47286 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47286?

CVE-2021-47286 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-2021-47286?

Yes, CVE-2021-47286 has been patched. Fixed versions include 5.10.54, 5.13.6 and 5.14. 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-2021-47286 actively exploited?

CVE-2021-47286 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-2021-47286

High

In the Linux kernel, the following vulnerability has been resolved: bus: mhi: core: Validate channel ID when processing command completions MHI reads the channel ID from the event ring element sent by the device which can be any value between 0 and 255. In order to prevent any out of bound accesses, add a check against the maximum number of channels supported by the controller and those channels not configured yet so as to skip processing of that event ring element.

Package Linux Kernel

Published 2024-05-21

Last modified 2025-04-30

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-787

CVE-2021-47286 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 5.7 and later are affected. Fixed in 5.10.54, 5.13.6, 5.14 and their respective stable series.

Affected from

≥ 5.7

Fixed in

✓ 5.10.54 5.10.x ✓ 5.13.6 5.13.x ✓ 5.14

References

3 total

Kernel Git
https://git.kernel.org/stable/c/3efec3b4b16fc7af25676a94230a8ab2a3bb867c

Patch
Kernel Git
https://git.kernel.org/stable/c/546362a9ef2ef40b57c6605f14e88ced507f8dd0

Patch
Kernel Git
https://git.kernel.org/stable/c/aed4f5b51aba41e2afd7cfda20a0571a6a67dfe9

Patch

Details

CVE ID CVE-2021-47286

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-05-21

Modified 2025-04-30

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47286?

CVE-2021-47286 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Out-of-bounds Write flaw (CWE-787) . It affects Linux kernel versions from 5.7 onward and has been patched in 5.10.54, 5.13.6 and 5.14. CVE-2021-47286 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47286?

CVE-2021-47286 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-2021-47286?

Yes. CVE-2021-47286 has been patched. Fixed versions include 5.10.54, 5.13.6 and 5.14. 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-2021-47286 actively exploited?

No. CVE-2021-47286 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.