The comm utility in uutils coreutils silently corrupts data by performing lossy UTF-8 conversion on all output lines.

Code

The project this record applies to. Exploit listings stay in References.

• Repository · github.com

Timeline

Detection, updates, and resolution for this record.

1. Apr 22, 2026 · NIST NVD

   Detected

   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

2. Jun 17, 2026 · NIST NVD

   Updated

   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

Affected

• cpe uutils/coreutilsversion unspecified

Sources

• CVE.orgVulnerability recordCVE-2026-35346

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-2026-35346

  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 diff

  nvd.nist.gov

References

• Exploit · github.com
• Issue Tracking · github.com
• Release Notes · github.com