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.

References

https://www.vulncheck.com/advisories/rsync-symlink-race-condition-via-acl-xattr-application

https://github.com/RsyncProject/rsync/security/advisories/GHSA-phxh-hjqv-39c9

https://github.com/RsyncProject/rsync/releases/tag/v3.5.0

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4