rsync: TOCTOU symlink race condition allowing local privilege escalation in daemon mode without chroot.

A flaw was found in rsync. An rsync daemon configured with "use chroot = no" is exposed to a time-of-check / time-of-use race on parent path components. A local attacker with write access to a module can replace a parent directory component with a symlink between the receiver's check and its open...

CVE-2026-43619

Rsync version 3.4.2 and prior contain symlink race condition vulnerabilities in path-based system calls including chmod, lchown, utimes, rename, unlink, mkdir, symlink, mknod, link, rmdir, and lstat that allow local attackers to redirect operations to files outside the exported rsync module...

PT-2026-42053

Name of the Vulnerable Software and Affected Versions rsync versions prior to 3.4.3 Description A symlink race condition exists in path-based system calls, including chmod, lchown, utimes, rename, unlink, mkdir, symlink, mknod, link, rmdir, and lstat. Local attackers with filesystem access can...