CVE-2026-35346
Description
The comm utility in uutils coreutils silently corrupts data by performing lossy UTF-8 conversion on all output lines. The implementation uses String::from_utf8_lossy(), which replaces invalid UTF-8 byte sequences with the Unicode replacement character (U+FFFD). This behavior differs from GNU comm, which processes raw bytes and preserves the original input. This results in corrupted output when the utility is used to compare binary files or files using non-UTF-8 legacy encodings.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Debian Mixed 3 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Affected | — |
| sid | Fixed | 0.6.0-1 |
| bookworm | Affected | — |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-35346
- https://github.com/uutils/coreutils/issues/10192
- https://github.com/uutils/coreutils/pull/10206
- https://github.com/uutils/coreutils/commit/b9372e509ea9b278fe13763237067a261bb8c946
- https://github.com/uutils/coreutils
- https://github.com/uutils/coreutils/releases/tag/0.6.0
- https://security-tracker.debian.org/tracker/CVE-2026-35346
- https://github.com/advisories/GHSA-hwhf-8p2f-45wr
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.