An Ubuntu-specific patch in PulseAudio created a race condition where the snap policy module would fail to identify a client connection from a snap as coming from a snap if SCM_CREDENTIALS were missing allowing the snap to connect to PulseAudio without proper confinement. This could be exploited by an attacker to expose sensitive information. Fixed in 1:13.99.3-1ubuntu2 1:13.99.2-1ubuntu2.1 1:13.99.1-1ubuntu3.8 1:11.1-1ubuntu7.11 and 1:8.0-0ubuntu3.15.