Ubuntu 16.04 ESM / 18.04 ESM : X.Org X Server regression (USN-6587-4)

The remote Ubuntu 16.04 ESM / 18.04 ESM host has packages installed that are affected by a vulnerability as referenced in the USN-6587-4 advisory. USN-6587-1 fixed vulnerabilities in X.Org X Server. The fix was incomplete resulting in a possible regression. This update fixes the problem. Tenable...