What is CVE-2021-3428?

CVE-2021-3428 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Integer Overflow flaw (CWE-190). CVE-2021-3428 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-3428?

CVE-2021-3428 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-2021-3428?

No patch is currently available for CVE-2021-3428. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-3428 actively exploited?

CVE-2021-3428 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Integer Overflow (CWE-190)?

The product performs a calculation that can produce an integer overflow, leading to unexpected values. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/190.html

CVE-2021-3428

Medium

A flaw was found in the Linux kernel. A denial of service problem is identified if an extent tree is corrupted in a crafted ext4 filesystem in fs/ext4/extents.c in ext4_es_cache_extent. Fabricating an integer overflow, A local attacker with a special user privilege may cause a system crash problem which can lead to an availability threat.

Package Linux Kernel

Published 2022-03-04

Last modified 2024-11-21

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-190

CVE-2021-3428 is a Integer Overflow vulnerability

What is Integer Overflow?

The product performs a calculation that can produce an integer overflow, leading to unexpected values. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2021-3428 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=1972621

Issue Tracking Permissions Required Third Party Advisory
Ubuntu Security
https://ubuntu.com/security/CVE-2021-3428

Third Party Advisory
Openwall
https://www.openwall.com/lists/oss-security/2021/03/17/1

Mailing List Third Party Advisory

Details

CVE ID CVE-2021-3428

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2022-03-04

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-3428?

CVE-2021-3428 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Integer Overflow flaw (CWE-190) . CVE-2021-3428 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-3428?

CVE-2021-3428 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-2021-3428?

No patch is currently available for CVE-2021-3428. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-3428 actively exploited?

No — CVE-2021-3428 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Integer Overflow (CWE-190)?

The product performs a calculation that can produce an integer overflow, leading to unexpected values. View CWE-190 on MITRE CWE →