Ubuntu Security Notice 4689-2 – USN-4689-1 fixed vulnerabilities in the NVIDIA graphics drivers. This update provides the corresponding updates for the NVIDIA Linux DKMS kernel modules. It was discovered that the NVIDIA GPU display driver for the Linux kernel contained a vulnerability that allowed user-mode clients to access legacy privileged APIs. A local attacker could use this to cause a denial of service or escalate privileges. Various other issues were also addressed.