PT-2021-7350 · Linux+8 · Linux Kernel+8

Alois Wohlschlager · Published 2021-08-12 · Updated 2023-08-14 · CVE-2021-3732

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue is related to a flaw in the Linux kernel's OverlayFS subsystem, specifically in how 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, potentially leading to information disclosure.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Information Disclosure

Weakness Enumeration

CWE-200

Related Identifiers

ALSA-2021:4356

ALT-PU-2021-2824

ALT-PU-2021-2926

ALT-PU-2021-3041

ALT-PU-2021-3563

ALT-PU-2021-3573

ALT-PU-2022-1240

ALT-PU-2022-1419

ALT-PU-2022-1421

ALT-PU-2023-1814

ALT-PU-2023-4894

BDU:2022-05770

CESA-2021_4140

CESA-2021_4356

CVE-2021-3732

DLA-2785-1

DLA-2843-1

DSA-4978-1

OPENSUSE-SU-2021:1271-1

OPENSUSE-SU-2021:3179-1

OPENSUSE-SU-2021:3205-1

OPENSUSE-SU-2021:3876-1

OPENSUSE-SU-2021_1271-1

OPENSUSE-SU-2021_3179-1

OPENSUSE-SU-2021_3205-1

OPENSUSE-SU-2021_3876-1

RHSA-2021:4140

RHSA-2021:4356

RHSA-2021_4140

RHSA-2021_4356

SUSE-SU-2021:3177-1

SUSE-SU-2021:3178-1

SUSE-SU-2021:3179-1

SUSE-SU-2021:3192-1

SUSE-SU-2021:3205-1

SUSE-SU-2021:3205-2

SUSE-SU-2021:3206-1

SUSE-SU-2021:3207-1

SUSE-SU-2021:3217-1

SUSE-SU-2021:3415-1

SUSE-SU-2021:3876-1

SUSE-SU-2021:3929-1

SUSE-SU-2021:3935-1

SUSE-SU-2021:3969-1

SUSE-SU-2021:3972-1

USN-5094-1

USN-5094-2

USN-5096-1

USN-5113-1

USN-5115-1

USN-5116-1

USN-5116-2

USN-6001-1

USN-6013-1

USN-6014-1

Affected Products

Alt Linux

Almalinux

Astra Linux

Centos

Linuxmint

Linux Kernel

Red Hat

Suse

Ubuntu

References · 570

• https://github.com/torvalds/linux/commit/427215d85e8d1476da1a86b8d67aceb485eb3631 · Patch
• https://osv.dev/vulnerability/USN-5116-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-42008 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-38160 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-4978-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-1095 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-3679 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-0617 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:3929-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-38204 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:3935-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-0487 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-3732 · Security Note
• https://ubuntu.com/security/notices/USN-5113-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:3179-1 · Vendor Advisory