# CVE-2026-35347: rust-coreutils: The comm utility in uutils coreutils incorrectly consumes data from non-regular file inputs before performing compari...

CVE-2026-35347 is fixed in rust-coreutils on 1 platform by DEBIAN-CVE-2026-35347 (version 0.6.0-1), released April 22, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-35347
- Priority: Routine
- CVSS: 4.4 (medium)
- EPSS: 0.0014
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 22, 2026

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | rust-coreutils Debian 14 | 0.6.0-1 | [DEBIAN-CVE-2026-35347](https://patchblox.com/security/data/fix/linux/debian-cve-2026-35347.md) | Apr 22, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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