[Pkg-rust-maintainers] Bug#1136203: rust-coreutils: CVE-2026-35376

[Moritz Mühlenhoff]

Source: rust-coreutils
X-Debbugs-CC: team at security.debian.org
Severity: important
Tags: security

Hi,

The following vulnerability was published for rust-coreutils.

CVE-2026-35376[0]:
| A Time-of-Check to Time-of-Use (TOCTOU) vulnerability exists in the
| chcon utility of uutils coreutils during recursive operations. The
| implementation resolves recursive targets using a fresh path lookup
| (via fts_accpath) rather than binding the traversal and label
| application to the specific directory state encountered during
| traversal. Because these operations are not anchored to file
| descriptors, a local attacker with write access to a directory tree
| can exploit timing-sensitive rename or symbolic link races to
| redirect a privileged recursive relabeling operation to unintended
| files or directories. This vulnerability breaks the hardening
| expectations for SELinux administration workflows and can lead to
| the unauthorized modification of security labels on sensitive system
| objects.

https://github.com/uutils/coreutils/pull/11402


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-2026-35376
    https://www.cve.org/CVERecord?id=CVE-2026-35376

Please adjust the affected versions in the BTS as needed.