uutils coreutils mv Security Xattr TOCTOU Race in Cross-Device
A Time-of-Check to Time-of-Use (TOCTOU) vulnerability exists in the mv utility of uutils coreutils during cross-device moves. The extended attribute (xattr) preservation logic uses multiple path-based system calls that perform fresh path-to-inode lookups for each operation. A local attacker with write access to the directory can exploit this race to swap files between calls, causing the destination file to receive an inconsistent mix of security xattrs, such as SELinux labels or file capabilities.
AV:LAttack VectorAC:HAttack ComplexityPR:LPrivileges RequiredUI:NUser InteractionS:UScopeC:NConfidentialityI:HIntegrityA:NAvailabilityClick technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.
Get the full picture for CVE-2026-35354 and every CVE in our database. Create a free account — no credit card required.
Create Free Account