uucore: safe_traversal TOCTOU protection only enabled on Linux
The safe_traversal module in uutils coreutils, which provides protection against Time-of-Check to Time-of-Use (TOCTOU) symlink races using file-descriptor-relative syscalls, is incorrectly limited to Linux targets. On other Unix-like systems such as macOS and FreeBSD, the utility fails to utilize these protections, leaving directory traversal operations vulnerable to symlink race conditions. --- _Zellic finding 3.59. Reported in the Zellic *uutils coreutils Program Security Assessment* (for Canonical, Jan 2026), audited commit `3a07ffc5a9bd4c283e75afa548ba1f1957bad242`._
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-35362US | — | — | ||
The safe_traversal module in uutils coreutils, which provides protection against Time-of-Check to Time-of-Use (TOCTOU) symlink races using file-descriptor-relative syscalls, is inc… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/uutils/coreutilsPACKAGE
- https://github.com/uutils/coreutils/commit/30239e69a328e76d2377f2a0bc02fbde61c34280WEB
- https://github.com/uutils/coreutils/pull/9792WEB
- https://github.com/uutils/coreutils/releases/tag/0.6.0WEB
- https://github.com/uutils/coreutils/security/advisories/GHSA-w6xc-g9qj-vp32WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-35362ADVISORY
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