CVE-2026-35346

The record

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

Related vulnerabilities

• GHSA-hwhf-8p2f-45wr coreutils' comm utility silently corrupts data by performing lossy UTF-8 conversion on… Same vulnerability
• GHSA-532v-xp3f-837c uutils coreutils has an Incorrect Provision of Specified Functionality Issue in its cut… Also affects coreutils
• GHSA-6g8r-74qp-6859 uutils coreutils has a Time-of-check Time-of-use (TOCTOU) Race Condition Also affects coreutils
• GHSA-53gr-wmf4-8hh3 uutils coreutils's User Interface (UI) Misrepresents Critical Information Also affects coreutils
• GHSA-5pv5-xh52-hvrp uutils coreutils has an Incorrect Short Circuit Evaluation Issue Also affects coreutils
• GHSA-5v4g-vw9x-h534 uutils coreutils has an Improper Input Validation Issue in its env Utility Also affects coreutils
• GHSA-4wrp-79m8-9m9p uutils coreutils has a Time-of-check Time-of-use (TOCTOU) Race Condition Also affects coreutils
• GHSA-fhr3-xh3q-69w6 uutils coreutils has an Incorrect Provision of Specified Functionality Issue Also affects coreutils