CVE-2021-3732

Description

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.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.01%
Vendor Advisory kernel.org
Affected: n/a kernel
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1995249 issue tracking third party advisory patch
https://ubuntu.com/security/CVE-2021-3732 third party advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=427215d85e8d1476da1a86b8d67aceb485eb3631 mailing list patch vendor advisory
https://github.com/torvalds/linux/commit/427215d85e8d1476da1a86b8d67aceb485eb3631 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-3732?
CVE-2021-3732 has been scored as a medium severity vulnerability.
How to fix CVE-2021-3732?
To fix CVE-2021-3732, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-3732 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-3732 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-3732?
CVE-2021-3732 affects n/a kernel.
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