High · published April 16, 2026
In rsync 3.0.1 through 3.4.1, receive_xattr relies on an untrusted length value during a qsort call, leading to a receiver use-after-free. The victim must run rsync with -X (aka --xattrs). On Linux, many (but not all) common configurations are vulnerable. Non-Linux platforms are more widely vulnerable.
| Product | Versions | Fixed in |
|---|---|---|
| samba/rsync | ≥ 3.0.1, ≤ 3.4.1 | — |