Among the 2 debian patches available in version 8.15-2 of the package, we noticed the following issues:
commit 54d1739e4a082bfb93d02caf680fa71c88829e56 Author: Roland Rosenfeld <roland@debian.org> Date: Fri Dec 23 16:39:37 2022 +0100 Update to Standards-Version 4.6.2 (no changes).