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rsync before 3.5.0 contains a path confinement bypass vulnerability that allows remote clients to escape the intended inner-module root confinement by constructing paths that resolve outside the chroot boundary when the module root contains a /./ boundary marker. Attackers can exploit improper handling of the /./ notation or forge delta-basis transfers referencing xname paths that cross the /./ boundary to gain unauthorized read or write access to files outside the module's subtree.
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2026:67462 https://access.redhat.com/errata/RHSA-2026:67462
This issue has been addressed in the following products: Red Hat Enterprise Linux 10 Via RHSA-2026:67463 https://access.redhat.com/errata/RHSA-2026:67463