CVE-2026-53799

Description

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.

Weakness classification

• disclosure@vulncheck.com: CWE-59

Primary references

• disclosure@vulncheck.com — Product, Release Notes
• disclosure@vulncheck.com — Vendor Advisory
• disclosure@vulncheck.com — Release Notes, Third Party Advisory