CVE-2020-35512
A use-after-free flaw was found in D-Bus 1.12.20 when a system has multiple usernames sharing the same UID. When a set of policy rules references these usernames, D-Bus may free some memory in the heap, which is still used by data structures necessary for the other usernames sharing the UID, possibly leading to a crash or other undefined behaviors
Source: CVE-2020-35512