Yes, I should confirm that since 4.6beta3 there is no more resource leakage in Linux version.

Also just received a report that there were recently another issues with DwarfPool so it rejected a lot of shares in a raw. But this time it was not CDM, but another miner. So I tend to think that my issue with 4.6 was not a miner fault. All I needed was to have an option to restart miner not after some percent of rejects, but after some percent per time interval or sliding window.