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CVE-2021-3732

Good to know:

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Date: March 7, 2022

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.

Language: C

Severity Score

Related Resources (10)

https://ubuntu.com/security/CVE-2021-3732
https://bugzilla.redhat.com/show_bug.cgi?id=1995249
https://security-tracker.debian.org/tracker/CVE-2021-3732
https://github.com/torvalds/linux/commit/427215d85e8d1476da1a86b8d67aceb485eb3631
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-3732
https://github.com/gregkh/linux/commit/427215d85e8d1476da1a86b8d67aceb485eb3631
https://nvd.nist.gov/vuln/detail/CVE-2021-3732
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=427215d85e8d1476da1a86b8d67aceb485eb3631
https://access.redhat.com/security/cve/CVE-2021-3732
https://www.mend.io/vulnerability-database/CVE-2021-3732

Severity Score

Weakness Type (CWE)

Exposure of Sensitive Information to an Unauthorized Actor

CWE-200

Insufficient Information

NVD-CWE-noinfo

Top Fix

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Upgrade Version

Upgrade to version linux-libc-headers - 5.8;linux-libc-headers - 5.14

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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