On January 14 2025, the rsync package received important security updates, which fixed serious and critical vulnerabilities, on multiple Linux distributions.
Unfortunately the package update fixing these vulnerabilities also introduced a regression. This regression negatively affects scripts using rsync, including the widely used rsnapshot backup method.
The regression was reported quickly, for example on Ubuntu's Launchpad as bug number LP #2095004:
The fixes for the regression were released on January 16 2025.
The latest Ubuntu LTS (24.04/Noble) fixes the regression in rsync package 3.2.7-1ubuntu1.2.
Debian 12 (Bookworm) fixes the regression in 3.2.7-1+deb12u2, announced in DSA-5843-2.