CVE-2026-35374
Publication date 22 April 2026
Last updated 11 November 2026
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| rust-coreutils | 26.10 stonking |
Fixed in 0.10.0-1ubuntu1
|
| 26.04 LTS resolute |
Fixed in 0.10.0-1ubuntu2~26.04.1
|
|
| 24.04 LTS noble |
Vulnerable
|
|
| 22.04 LTS jammy | Not in release |
Notes
john-breton
Fixed in 0.10.0-1ubuntu2~26.04.1 in resolute-updates (LP: #2166202), but not yet in the -security pocket.
Severity score breakdown
CVSS version: CVSS v3.0
Base score
6.3 · Medium
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
References
Related Ubuntu Security Notices (USN)
- USN-9041-1
- uutils coreutils vulnerabilities
- 11 November 2026