uutils/coreutils · Security
ln: rejects non-UTF-8 source filenames in target-directory mode
- GHSA ID
- GHSA-jcjr-rh8q-7xqf
- CVE ID
- CVE-2026-35373
- Severity
- low
- Published
- Updated
- CVSS
- 3.3 · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
- CVSS v3
- 3.3 · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Description
In target-directory forms (ln SOURCE... DIRECTORY), ln rejects source paths with non-UTF-8 filename bytes, while GNU accepts them. Breaks GNU compatibility for byte-oriented filenames on Unix filesystems.
PoC:
name=$(printf 'bad_\377'); mkdir dst; : > "$name"; ln "$name" dst
# GNU: exit 0, creates dst/bad_\377 ; uutils: exit 1, dst empty
Zellic private finding (zellic-ext/coreutils-private PR #84). Reported in the Zellic uutils coreutils Program Security Assessment (for Canonical, Jan 2026), audited commit 3a07ffc5a9bd4c283e75afa548ba1f1957bad242.
CWEs
- CWE-176 · Improper Handling of Unicode Encoding