DEBIAN-CVE-2021-3996
Record from OSV · Published August 23, 2022
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.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| util-linux | Debian:12 | 2.37.3-1 |
| util-linux | Debian:13 | 2.37.3-1 |
| util-linux | Debian:14 | 2.37.3-1 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Debian:12 | util-linux | 0 |
| Debian:13 | util-linux | 0 |
| Debian:14 | util-linux | 0 |
Timeline
- Aug 23, 2022 CVE Published
- Oct 23, 2026 CVE Updated
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