Vulnerability in Kernel Util-linux
CVE-2021-3996
A logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem. This flaw allows a local user on a vulnerable system to unmount other users' filesystems that are…
EPSS: 0.006 (46.4th percentile) — read the EPSS interpretation.
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:N/I:N/A:H.
Affected products
- Kernel Util-linux
- Fedoraproject Fedora — versions 35
- N/a Util-linux — versions Fixed in util-linux v2.37.3
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Release Notes, Vendor Advisory)
- secalert@redhat.com (Patch, Third Party Advisory)
- secalert@redhat.com (Exploit, Patch, Mailing List, Third Party Advisory)
- secalert@redhat.com (Patch, Third Party Advisory, Issue Tracking)
- secalert@redhat.com (Third Party Advisory, Issue Tracking)
- secalert@redhat.com (mailing-list, Mailing List, Third Party Advisory)
- secalert@redhat.com (mailing-list, Mailing List, Third Party Advisory)
- secalert@redhat.com (Third Party Advisory)
- secalert@redhat.com (Third Party Advisory, Broken Link)
- secalert@redhat.com (vendor-advisory)
Frequently asked questions
- What is CVE-2021-3996?
- CVE-2021-3996 is a medium-severity vulnerability in Kernel Util-linux, classified under Files or Directories Accessible to External Parties. CVSS score: 5.5/10. Published 2022-08-23.
- How severe is CVE-2021-3996?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2021-3996 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.