Hi,

The following vulnerability was published for rust-coreutils.

CVE-2026-35374[0]:
| 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.

https://github.com/uutils/coreutils/pull/11401


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-35374
https://www.cve.org/CVERecord?id=CVE-2026-35374

Please adjust the affected versions in the BTS as needed.

These CVEs are all fixed in the upstream 0.10.0 release, which was
uploaded to unstable as rust-coreutils 0.10.0-1:

#1135993 CVE-2026-35344 dd: propagate truncate errors on regular files
#1135994 CVE-2026-35345 tail: treat a watched file replaced by a symlink
as untailable
#1136042 CVE-2026-35352 mkfifo: drop path-based chmod, closing the
TOCTOU race
#1136044 CVE-2026-35360 touch: create without O_TRUNC so a raced open no
longer truncates
#1136202 CVE-2026-35374 split: harden output open path against TOCTOU
target swaps
#1136203 CVE-2026-35376 chcon: anchor recursive relabel resolution to
the traversal dirfd
#1136207 CVE-2026-35377 env: keep backslashes literal in single quotes,
matching GNU

Cheers
Sylvestre