CVE-2026-53792
Fixed in a distro release EPSS <1%CVSS 6.5
rsync before 3.5.0 contains an out-of-bounds read vulnerability in the sender-side block matching logic that allows a malicious receiver to trigger memory access before the start of an allocated buffer by sending a crafted checksum block with a length of zero. Attackers can send a specially crafted checksum set containing a zero-length block to cause a negative offset calculation during delta computation, resulting in an out-of-bounds read of file data buffer memory on the sender side.
Products: RsyncProject rsync
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.21 | rsync | 3.5.0-r0 |
| Alpine 3.22 | rsync | 3.5.0-r0 |
| Alpine 3.23 | rsync | 3.5.0-r0 |
| Alpine 3.24 | rsync | 3.5.0-r0 |
| Amazon Linux 2023 | rsync | 3.5.1-1.amzn2023.0.1 |
| Amazon Linux 2023 | rsync-daemon | 3.5.1-1.amzn2023.0.1 |
| Debian 12 | rsync | no fix |
| Debian 13 | rsync | 3.5.0+ds1-0+deb13u1 |
| Debian 14 | rsync | 3.5.0+ds1-1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | rsync | 3.2.3-150400.3.34.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | rsync | 3.2.3-150400.3.34.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | rsync | 3.2.3-150400.3.34.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | rsync | 3.2.3-150400.3.34.1 |
| SUSE Linux Enterprise Micro 5.3 | rsync | 3.2.3-150400.3.34.1 |
| SUSE Linux Enterprise Micro 5.4 | rsync | 3.2.3-150400.3.34.1 |
| SUSE Linux Enterprise Micro 5.5 | rsync | 3.2.3-150400.3.34.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | rsync | 3.2.7-150600.3.24.1 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | rsync | 3.2.3-150400.3.34.1 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | rsync | 3.2.3-150400.3.34.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | rsync | 3.2.7-150600.3.24.1 |
| SUSE Linux Enterprise Server 16.0 | rsync | 3.4.1-160000.6.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | rsync | 3.2.3-150400.3.34.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | rsync | 3.2.3-150400.3.34.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | rsync | 3.2.7-150600.3.24.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | rsync | 3.4.1-160000.6.1 |
| SUSE Linux Micro 6.0 | rsync | 3.2.7-8.1 |
| SUSE Linux Micro 6.1 | rsync | 3.3.0-slfo.1.1_7.1 |
| SUSE Linux Micro 6.2 | rsync | 3.4.1-160000.6.1 |
| Ubuntu 22.04 LTS | rsync | no fix |
| Ubuntu 24.04 LTS | rsync | no fix |
| Ubuntu 26.04 LTS | rsync | no fix |
| Ubuntu 26.10 | rsync | no fix |
| Ubuntu Pro 14.04 LTS | rsync | no fix |
| Ubuntu Pro 16.04 LTS | rsync | no fix |
| Ubuntu Pro 18.04 LTS | rsync | no fix |
| Ubuntu Pro 20.04 LTS | rsync | no fix |
| openSUSE Leap 16.0 | rsync | 3.4.1-160000.6.1 |
| openSUSE Tumbleweed | rsync | 3.5.1-1.1 |