CVE-2026-35374 Details
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.
A Time-of-Check to Time-of-Use (TOCTOU) vulnerability has been identified in the split utility of uutils coreutils. This vulnerability arises because the program, while attempting to prevent data loss by verifying the identity of input and output files through their file paths, ultimately opens the output file with truncation after this validation. A local attacker with write access to the directory can exploit this timing issue by manipulating path components, such as swapping a path with a symbolic link. This exploitation can lead to the split utility truncating and writing to an unintended file, which may include the input file or other sensitive files accessible to the process, resulting in permanent data loss.
Users can apply the patch available in the GitHub pull request #11401 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 22, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/uutils/coreutils/pull/11401 | [email protected] | Issue Tracking |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-367 | Time-of-check Time-of-use (TOCTOU) Race Condition | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| uutils coreutils | All versions |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 4, 2026 | Initial Analysis | [email protected] |
| Apr 22, 2026 | New CVE Received | [email protected] |