CVE-2026-35355 — uutils coreutils install Arbitrary File Overwrite via Symlink TOCTOU Race
The install utility in uutils coreutils is vulnerable to a Time-of-Check to Time-of-Use (TOCTOU) race condition during file installation. The implementation unlinks an existing …
Published: 2026-04-22 · CVSS: 6.3 · CVSS 3.1
The install utility in uutils coreutils is vulnerable to a Time-of-Check to Time-of-Use (TOCTOU) race condition during file installation. The implementation unlinks an existing destination file and then recreates it using a path-based operation without the O_EXCL flag. A local attacker can exploit the window between the unlink and the subsequent creation to swap the path with a symbolic link, allowing them to redirect privileged writes to overwrite arbitrary system files.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7