low3.3
CVE-2026-35346
The comm utility in uutils coreutils silently corrupts data by performing lossy UTF-8 conversion on all output lines.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rust | uu_comm | < 0.6.0 | 0.6.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Uutils | Coreutils | before 0.6.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-6gcw-w7cp-94g9
- https://github.com/uutils/coreutils/security/advisories/GHSA-6gcw-w7cp-94g9
- 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/releases/tag/0.6.0