An issue was discovered in GNOME GLib before 2.78.5, and 2.79.x and 2.80.x before 2.80.1. When a GDBus-based client subscribes to signals from a trusted system service such as NetworkManager on a shared computer, other users of the same computer can send spoofed D-Bus signals that the GDBus-based client will wrongly interpret as having been sent by the trusted system service. This could lead to the GDBus-based client behaving incorrectly, with an application-dependent impact.
https://www.openwall.com/lists/oss-security/2024/05/07/5
https://security.netapp.com/advisory/ntap-20240531-0008/
https://lists.debian.org/debian-lts-announce/2024/05/msg00008.html