# CVE-2026-35374: rust-coreutils: A Time-of-Check to Time-of-Use (TOCTOU) vulnerability exists in the split utility of uutils coreutils

CVE-2026-35374 is fixed in rust-coreutils on 1 platform by DEBIAN-CVE-2026-35374 (version 0.10.0-1), released April 22, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-35374
- Priority: Routine
- CVSS: 6.3 (medium)
- EPSS: 0.0007
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 22, 2026

## Description

A Time-of-Check to Time-of-Use (TOCTOU) vulnerability exists in the split utility of uutils coreutils. The program attempts to prevent data loss by checking for identity between input and output files using their file paths before initiating the split operation. However, the utility subsequently opens the output file with truncation after this path-based validation is complete. A local attacker with write access to the directory can exploit this race window by manipulating mutable path components (e.g., swapping a path with a symbolic link). This can cause split to truncate and write to an unintended target file, potentially including the input file itself or other sensitive files accessible to the process, leading to permanent data loss.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | rust-coreutils Debian 14 | 0.10.0-1 | [DEBIAN-CVE-2026-35374](https://patchblox.com/security/data/fix/linux/debian-cve-2026-35374.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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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