What is CVE-2021-3732?

CVE-2021-3732 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Information Exposure flaw (CWE-200). CVE-2021-3732 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-3732?

CVE-2021-3732 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:H/I:N/A:N.

Is there a patch available for CVE-2021-3732?

No patch is currently available for CVE-2021-3732. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-3732 actively exploited?

CVE-2021-3732 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Information Exposure (CWE-200)?

The product exposes sensitive information to an actor not authorised to see it. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/200.html

CVE-2021-3732

Medium

A flaw was found in the Linux kernel's OverlayFS subsystem in the way the user mounts the TmpFS filesystem with OverlayFS. This flaw allows a local user to gain access to hidden files that should not be accessible.

Package Linux Kernel

Published 2022-03-10

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

High

Integrity

None

Availability

None

Vector string

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

Weakness type

CWE-200

CVE-2021-3732 is a Information Exposure vulnerability

What is Information Exposure?

The product exposes sensitive information to an actor not authorised to see it. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2021-3732 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Ubuntu Security
https://ubuntu.com/security/CVE-2021-3732

Third Party Advisory
Kernel patch commit
https://bugzilla.redhat.com/show_bug.cgi?id=1995249
Patch
Kernel patch commit
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=427215d85e8d1476da1a86b8d67aceb485eb3631
Patch
Kernel patch commit
https://github.com/torvalds/linux/commit/427215d85e8d1476da1a86b8d67aceb485eb3631
Patch

Details

CVE ID CVE-2021-3732

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2022-03-10

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-3732?

CVE-2021-3732 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Information Exposure flaw (CWE-200) . CVE-2021-3732 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-3732?

CVE-2021-3732 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:H/I:N/A:N.
Is there a patch available for CVE-2021-3732?

No patch is currently available for CVE-2021-3732. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-3732 actively exploited?

No — CVE-2021-3732 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Information Exposure (CWE-200)?

The product exposes sensitive information to an actor not authorised to see it. View CWE-200 on MITRE CWE →