CVE-2026-35347

The record

The comm utility in uutils coreutils incorrectly consumes data from non-regular file inputs before performing comparison operations. The are_files_identical function opens and reads from both input paths to compare content without first verifying if the paths refer to regular files. If an input path is a FIFO or a pipe, this pre-read operation drains the stream, leading to silent data loss before the actual comparison logic is executed. Additionally, the utility may hang indefinitely if it attempts to pre-read from infinite streams like /dev/zero.

Affected packages

Related vulnerabilities

• GHSA-rx8h-33gr-vhj9 uutils coreutils' comm utility incorrectly consumes data from non-regular file inputs… 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