CVE-2026-53798
Description
rsync before 3.5.0 contains a privilege confusion vulnerability in the name-converter subprocess uid/gid mapping that allows local attackers to cause transferred files to be owned by root by influencing name-converter responses to return empty values. When the name-converter subprocess returns an empty response for a uid or gid lookup, rsync incorrectly interprets it as a successful resolution to uid/gid 0 (root) rather than a lookup failure, and if the name-converter also signals fake super-user status, rsync proceeds with root ownership assignments for transferred files.
How to fix
- samba rsync3.5.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| samba rsync | v < 3.5.0 | 3.5.0 |
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