Is there a better way to workaround this issue, since I would really feel better having the ShellShock patched bash version installed, and I am not sure if I can only upgade that somehow.
There is no sound in outgoing calls on my P880 running the latest CM11 nightlies starting from approx. the one released on the 24th of Septemeber, maybe earlier (I've seen this reported by other users as well in the development thread, but since I am a new user, I cannot just +1 there). The problem persists with the latest nightly that was just released (20140927). The issue does not appear with the M10 SNAPSHOT release (or an older nightly).