Information disclosure in Linux Kernel
CVE-2021-3732
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.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (26.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 26.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.000
Affected products
- Linux Kernel — versions 5.14
- Kernel — versions Affects kernel before v5.13.11, Fixed in v5.14-rc6 and later.
Weakness classification (CWE)
References
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- ubuntu.com/security/CVE-2021-3732 (Third Party Advisory)
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Mailing List, Vendor Advisory)
- github.com/torvalds/linux/commit/427215d85e8d1476da1a86b8d67aceb485eb3631 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-3732?
- CVE-2021-3732 is a medium-severity vulnerability in Linux Kernel, classified under Information Disclosure. CVSS score: 5.5/10. Published 2022-03-10.
- How severe is CVE-2021-3732?
- Medium severity. CVSS v3 base score is 5.5 out of 10.