Medium
rust-coreutils — security advisory
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.
- Products
- rust-coreutils
- Affected versions
- 0.0.20-1, 0.0.22-1, 0.0.23-1, 0.0.23-2, 0.0.23-3, 0.0.24-1, 0.0.24-2, 0.0.30-1, 0.0.30-2, 0.0.30-2ubuntu2, 0.1.0+git20250711.2ba3a33-0ubuntu1, 0.1.0+git20250711.2ba3a33-0ubuntu2, 0.1.0+git20250711.2ba3a33-0ubuntu3, 0.1.0+git20250711.2ba3a33-0ubuntu4, 0.1.0+git20250801.cf79675-0ubuntu1, 0.1.0+git20250813.4af2a84-0ubuntu2, 0.1.0+git20250813.4af2a84-0ubuntu4, 0.1.0+git20250813.4af2a84-0ubuntu6, 0.1.0+git20250813.4af2a84-0ubuntu7, 0.1.0-0ubuntu1, 0.10.0-1ubuntu1, 0.10.0-1ubuntu2, 0.10.0-1ubuntu2~26.04.1, 0.10.0-1ubuntu3, 0.11.0-2ubuntu1, 0.11.0-2ubuntu2, 0.12.0-1ubuntu1, 0.12.0-1ubuntu2, 0.2.2-0ubuntu1, 0.2.2-0ubuntu2, 0.2.2-0ubuntu2.1, 0.2.2-0ubuntu4, 0.5.0-0ubuntu1, 0.5.0-0ubuntu2, 0.6.0-0ubuntu1, 0.7.0-0ubuntu1, 0.8.0-0ubuntu3, 0.8.0-0ubuntu4, 0.9.0-2ubuntu2
- Fixed versions
- Not specified
- CVEs
- CVE-2026-35374
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:09 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2026-35374
rust-coreutils
Fixed versions: Not specified
rust-coreutils
Fixed versions: Not specified
rust-coreutils
Fixed versions: Not specified
rust-coreutils
Fixed versions: Not specified
Complete source record
{
"id": "b5e91ad899da5bd93e2a4791c8998b4e217e0ee37ef5587bfa038e14a78e3a2f",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-35374",
"method": "structured",
"payload": {
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"title": "UBUNTU-CVE-2026-35374",
"summary": "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.",
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"modified": "2026-10-17T12:58:12.851675871Z",
"provider": "osv",
"upstream": [
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"references": [
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"https://www.cve.org/CVERecord?id=CVE-2026-35374",
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"published_at": "2026-04-22T17:16:00+00:00"
}