What is CVE-2021-47166?

CVE-2021-47166 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). CVE-2021-47166 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47166?

CVE-2021-47166 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-2021-47166?

No patch is currently available for CVE-2021-47166. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-47166 actively exploited?

CVE-2021-47166 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-2021-47166

Medium

In the Linux kernel, the following vulnerability has been resolved: NFS: Don't corrupt the value of pg_bytes_written in nfs_do_recoalesce() The value of mirror->pg_bytes_written should only be updated after a successful attempt to flush out the requests on the list.

Package Linux Kernel

Published 2024-03-25

Last modified 2025-03-17

CVSS version 3.1

Patch available

Awaiting data

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-2021-47166 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

References

The following references provide additional information about CVE-2021-47166 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/0d0ea309357dea0d85a82815f02157eb7fcda39f
Patch
Kernel patch commit
https://git.kernel.org/stable/c/2fe1cac336b55a1f79e603e9ce3552c3623e90eb
Patch
Kernel patch commit
https://git.kernel.org/stable/c/40f139a6d50c232c0d1fd1c5e65a845c62db0ede
Patch

8 patch commits total View all on NVD

Details

CVE ID CVE-2021-47166

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-03-25

Modified 2025-03-17

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-47166?

CVE-2021-47166 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) . CVE-2021-47166 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47166?

CVE-2021-47166 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-2021-47166?

No patch is currently available for CVE-2021-47166. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-47166 actively exploited?

No — CVE-2021-47166 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (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. View CWE-787 on MITRE CWE →