CVE-2026-35373

Description

A logic error in the ln utility of uutils coreutils causes the program to reject source paths containing non-UTF-8 filename bytes when using target-directory forms (e.g., ln SOURCE... DIRECTORY). While GNU ln treats filenames as raw bytes and creates the links correctly, the uutils implementation enforces UTF-8 encoding, resulting in a failure to stat the file and a non-zero exit code. In environments where automated scripts or system tasks process valid but non-UTF-8 filenames common on Unix filesystems, this divergence causes the utility to fail, leading to a local denial of service for those specific operations.

Predictions

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

References

• https://github.com/uutils/coreutils/pull/11403
• https://nvd.nist.gov/vuln/detail/CVE-2026-35373
• https://github.com/uutils/coreutils
• https://security-tracker.debian.org/tracker/CVE-2026-35373
• https://github.com/advisories/GHSA-xh5h-p8c5-4w4x

CWEs

CWE-176