VDB
ALPINE-CVE-2021-3996
ALPINE-CVE-2021-3996
PUBLISHED
CVSS 5.5 MEDIUM
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.
Risk Scores
CVSS v3.1
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Alpine:v3.19 | util-linux | 2.36.2-r0, 2.37.2-r7, 2.37.2-r6 |
| Alpine:v3.21 | util-linux | 2.19.1-r0, 2.34-r1, 2.35-r0 |
| Alpine:v3.15 | util-linux | 2.36-r2, 2.36.2-r0, 2.36.2-r1 |
| Alpine:v3.16 | util-linux | 2.36-r2, 2.19.1-r0, 2.14.2-r0 |
| Alpine:v3.20 | util-linux | 2.35.1-r0, 2.16-r2, 2.24.2-r0 |
| Alpine:v3.23 | util-linux | 2.24.2-r1, 0, 2.14.1-r1 |
| Alpine:v3.12 | util-linux | 2.14.1-r0, 2.35.2-r0, 2.35.1-r4 |
| Alpine:v3.14 | util-linux | 2.16.2-r0, 0, 2.14.1-r0 |
| Alpine:v3.18 | util-linux | 2.31-r0, 2.32-r0, 2.33-r0 |
| Alpine:v3.22 | util-linux | 2.37.2-r7, 0, 2.14.1-r0 |
| Alpine:v3.17 | util-linux | 2.14.1-r1, 2.24.2-r1, 2.24.2-r2 |
| Alpine:v3.13 | util-linux | 2.36.1-r1, 2.36.1-r0, 2.36-r2 |
Timeline
- Aug 23, 2022 CVE Published
- Dec 3, 2025 CVE Updated
- Apr 30, 2026 Distribution Patch