Link following in Rsync - CVE-2026-43619
Published: June 1, 2026
Vulnerability identifier: #VU133147
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-43619
CWE-ID: CWE-59
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Samba
Affected software:
Rsync
Rsync
Detailed vulnerability description
The vulnerability allows a local user to overwrite files and manipulate filesystem objects outside the module.
The vulnerability exists due to symlink race conditions in path-based system calls in daemon mode when handling path-based system calls without chroot. A local user can replace path components with symlinks during filesystem operations to overwrite files and manipulate filesystem objects outside the module.
Only daemon configurations with use chroot = no for a module are vulnerable.
How to mitigate CVE-2026-43619
Install security update from vendor's website.