CVE-2026-70453
Fixed in a distro release EPSS <1%CVSS 7.5
rsync before 3.5.0 contains an algorithmic complexity vulnerability in the hash_search() function that allows a remote attacker to cause a denial of service by delivering a carefully constructed file list. A sender can exploit the quadratic-time worst-case behavior in hash lookups to exhaust receiver CPU resources with a modest number of crafted entries, causing a sustained denial of service.
Products: RsyncProject rsync
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 10 | rsync | 3.5.0-3.el10_2 |
| AlmaLinux 10 | rsync-daemon | 3.5.0-3.el10_2 |
| AlmaLinux 10 | rsync-rrsync | 3.5.0-3.el10_2 |
| AlmaLinux 8 | rsync | 3.1.3-28.el8_10 |
| AlmaLinux 8 | rsync-daemon | 3.1.3-28.el8_10 |
| AlmaLinux 9 | rsync | 3.2.7-1.el9_8 |
| AlmaLinux 9 | rsync-daemon | 3.2.7-1.el9_8 |
| AlmaLinux 9 | rsync-rrsync | 3.2.7-1.el9_8 |
| 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 2 | rsync | 3.1.2-11.amzn2.0.8 |
| 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 |
| Red Hat Enterprise Linux 10.2 | rsync | 0:3.5.0-3.el10_2 |
| Red Hat Enterprise Linux 10.2 | rsync-daemon | 0:3.5.0-3.el10_2 |
| Red Hat Enterprise Linux 10.2 | rsync-debuginfo | 0:3.5.0-3.el10_2 |
| Red Hat Enterprise Linux 10.2 | rsync-debugsource | 0:3.5.0-3.el10_2 |
| Red Hat Enterprise Linux 10.2 | rsync-rrsync | 0:3.5.0-3.el10_2 |
| Red Hat Enterprise Linux 8 | rsync | 0:3.1.3-28.el8_10 |
| Red Hat Enterprise Linux 8 | rsync-daemon | 0:3.1.3-28.el8_10 |
| Red Hat Enterprise Linux 8 | rsync-debuginfo | 0:3.1.3-28.el8_10 |
| Red Hat Enterprise Linux 8 | rsync-debugsource | 0:3.1.3-28.el8_10 |
| Red Hat Enterprise Linux 9 | rsync | 0:3.2.7-1.el9_8 |
| Red Hat Enterprise Linux 9 | rsync-daemon | 0:3.2.7-1.el9_8 |
| Red Hat Enterprise Linux 9 | rsync-debuginfo | 0:3.2.7-1.el9_8 |
| Red Hat Enterprise Linux 9 | rsync-debugsource | 0:3.2.7-1.el9_8 |
| Red Hat Enterprise Linux 9 | rsync-rrsync | 0:3.2.7-1.el9_8 |
| Rocky Linux 10 | rsync | 0:3.5.0-3.el10_2 |
| Rocky Linux 8 | rsync | 0:3.1.3-28.el8_10 |
| Rocky Linux 9 | rsync | 0:3.2.7-1.el9_8 |
| 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 |