What is CVE-2021-4157?

CVE-2021-4157 is a High severity Linux kernel vulnerability with a CVSS score of 8.0 out of 10, classified as a Buffer Overflow flaw (CWE-119). CVE-2021-4157 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-4157?

CVE-2021-4157 has a CVSS score of 8.0 out of 10, rated High severity. The vector string is CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2021-4157?

No patch is currently available for CVE-2021-4157. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-4157 actively exploited?

CVE-2021-4157 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Buffer Overflow (CWE-119)?

The product performs operations on a memory buffer but reads or writes outside its intended boundaries. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/119.html

CVE-2021-4157

High

An out of memory bounds write flaw (1 or 2 bytes of memory) in the Linux kernel NFS subsystem was found in the way users use mirroring (replication of files with NFS). A user, having access to the NFS mount, could potentially use this flaw to crash the system or escalate privileges on the system.

Package Linux Kernel

Published 2022-03-25

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

8.0

out of 10

High

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-119

CVE-2021-4157 is a Buffer Overflow vulnerability

What is Buffer Overflow?

The product performs operations on a memory buffer but reads or writes outside its intended boundaries. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2021-4157 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=2034342

Issue Tracking Third Party Advisory
Kernel.org
https://lore.kernel.org/lkml/20210517140244.822185482%40linuxfoundation.org/
Security
https://security.netapp.com/advisory/ntap-20220602-0007/

Third Party Advisory
Oracle
https://www.oracle.com/security-alerts/cpujul2022.html

Third Party Advisory

Details

CVE ID CVE-2021-4157

Severity High

CVSS score 8.0 / 10

CVSS version 3.1

Published 2022-03-25

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-4157?

CVE-2021-4157 is a High severity Linux kernel vulnerability with a CVSS score of 8.0 out of 10 , classified as a Buffer Overflow flaw (CWE-119) . CVE-2021-4157 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-4157?

CVE-2021-4157 has a CVSS score of 8.0 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2021-4157?

No patch is currently available for CVE-2021-4157. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-4157 actively exploited?

No — CVE-2021-4157 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Buffer Overflow (CWE-119)?

The product performs operations on a memory buffer but reads or writes outside its intended boundaries. View CWE-119 on MITRE CWE →