CVE-2026-35373

lowCVSS 3.3covered by 1 sourcefirst seen 2026-07-06

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._

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Exploitation outlook

Low exploitation risk0.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.

Advisory coverage (1)

lowGHSA-jcjr-rh8q-7xqf: ln: rejects non-UTF-8 source filenames in target-directory modeghsa · 2026-07-06

External references

NVD record for CVE-2026-35373

CVE.org record

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