The upstream patch got applied as commit b121da2e21cabd2793fc423d84ceddd919fd6e47 and was released in sudo 1.8.11. Therefore this bug is fixed since Ubuntu 16.04 (xenial).
The upstream patch got applied as commit b121da2e21cabd2 793fc423d84cedd d919fd6e47 and was released in sudo 1.8.11. Therefore this bug is fixed since Ubuntu 16.04 (xenial).