CVE-2026-35372
uutils coreutils ln Security Bypass via Improper Handling of the --no-dereference Flag
- State
- Published
- Severity
- 5.0 Medium
- Published
- Apr 22, 2026
- Updated
- Apr 22, 2026
- Reserved
- Apr 2, 2026
Description
A logic error in the ln utility of uutils coreutils allows the utility to dereference a symbolic link target even when the --no-dereference (or -n) flag is explicitly provided. The implementation previously only honored the "no-dereference" intent if the --force (overwrite) mode was also enabled. This flaw causes ln to follow a symbolic link that points to a directory and create new links inside that target directory instead of treating the symbolic link itself as the destination. In environments where a privileged user or system script uses ln -n to update a symlink, a local attacker could manipulate existing symbolic links to redirect file creation into sensitive directories, potentially leading to unauthorized file creation or system misconfiguration.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.0 Medium | CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N | canonical |
Weaknesses
- CWE-61 UNIX Symbolic Link (Symlink) Following
Affected Products
| Product | Versions |
|---|---|
coreutilsUutils |
|
References
- https://github.com/uutils/coreutils/pull/11253issue-trackingpatch
- https://github.com/uutils/coreutils/releases/tag/0.8.0vendor-advisory
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