CVE-2026-43619
MediumCVSS 6.3Exploitation Probability (EPSS)
Low risk3th percentile - higher than 3% of all known CVEs
Summary
A vulnerability in rsync 3.4.2 and earlier allows local attacks via symlink race conditions. An attacker can swap symlinks in the timing window between path resolution and syscall execution, enabling operations on files outside the exported rsync module.
Risk Assessment
The risk involves overwriting permissions, ownership, timestamps, or filenames on arbitrary files outside the rsync module, potentially leading to privilege escalation or data integrity compromise in the organization.
Recommendation
Immediately update rsync to version 3.4.3 or later, and enable 'use chroot = yes' in the rsync daemon configuration if feasible.
Original NVD description (English source)
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. Attackers with local filesystem access can exploit the timing window between path resolution and syscall execution by swapping symlinks to apply sender-supplied permissions, ownership, timestamps, or filenames to arbitrary files outside the intended module boundary on rsync daemons configured with 'use chroot = no'.