This update for virglrenderer fixes the following issues: - CVE-2019-18388: Fixed a null pointer dereference which could have led to denial of service . - CVE-2019-18390: Fixed an out of bound read which could have led to denial of service . - CVE-2019-18389: Fixed a heap buffer overflow which could have led to guest escape or denial of service . - CVE-2019-18391: Fixed a heap based buffer overflow which could have led to guest escape or denial of service .