medium4.7
CVE-2026-35359
A Time-of-Check to Time-of-Use (TOCTOU) vulnerability in the cp utility of uutils coreutils allows an attacker to bypass no-dereference intent.
Impact
A Time-of-Check to Time-of-Use (TOCTOU) vulnerability in the cp utility of uutils coreutils allows an attacker to bypass no-dereference intent. The utility checks if a source path is a symbolic link using path-based metadata but subsequently opens it without the O_NOFOLLOW flag. An attacker with concurrent write access can swap a regular file for a symbolic link during this window, causing a privileged cp process to copy the contents of arbitrary sensitive files into a destination controlled by the attacker.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rust | coreutils | <= 0.8.0 | none recorded |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Uutils | Coreutils | All versions |