CVE-2026-53799: Samba Rsync

Medium severity, CVSS 6.3. EPSS: 0.1% chance of exploitation in the next 30 days.

rsync before 3.5.0 contains a symlink race condition vulnerability that allows local attackers to cause rsync to apply arbitrary ACLs or extended attributes to unintended files by substituting a symlink at a predictable destination path between the file write and the subsequent acl_set_file() or lsetxattr() call. Attackers can exploit this timing window to redirect ACL and xattr application through a crafted symlink to files outside the intended destination tree, potentially granting elevated permissions and enabling local privilege escalation.

Affected products

• Samba Rsync: before 3.5.0 (fixed in 3.5.0)

Published 2026-08-13. Last modified 2026-08-31.