CVE-2021-3996
published 2022-08-23CVE-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…
medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
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 either world-writable themselves (like /tmp) or mounted in a world-writable directory. An attacker may use this flaw to cause a denial of service to applications that use the affected filesystems.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | util-linux | < util-linux 2.37.3-1 (bookworm) | util-linux 2.37.3-1 (bookworm) |
| fedoraproject | fedora | — | — |
| kernel | util-linux | — | — |
| kernel | util-linux | >= 0 < 2.36.1-8+deb11u1 | 2.36.1-8+deb11u1 |
| kernel | util-linux | >= 0 < 2.37.3-1 | 2.37.3-1 |
| kernel | util-linux | >= 0 < 2.37.3-1 | 2.37.3-1 |
| kernel | util-linux | >= 0 < 2.37.3-1 | 2.37.3-1 |
| kernel | util-linux | >= 2.34 < 2.37.3 | 2.37.3 |
| msrc | cm1_util-linux_2.32.1-7_on_cbl_mariner_1.0 | — | — |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM