==========================================================================
Ubuntu Security Notice USN-4689-1
January 11, 2021

nvidia-graphics-drivers-390, nvidia-graphics-drivers-450,
nvidia-graphics-drivers-460 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in NVIDIA graphics drivers.

Software Description:
- nvidia-graphics-drivers-390: NVIDIA binary X.Org driver
- nvidia-graphics-drivers-450: NVIDIA binary X.Org driver
- nvidia-graphics-drivers-460: NVIDIA binary X.Org driver

Details:

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. (CVE-2021-1052)

It was discovered that the NVIDIA GPU display driver for the Linux kernel
did not properly validate a pointer received from userspace in some
situations. A local attacker could use this to cause a denial of service.
(CVE-2021-1053)

Xinyuan Lyu discovered that the NVIDIA GPU display driver for the Linux
kernel did not properly restrict device-level GPU isolation. A local
attacker could use this to cause a denial of service or possibly expose
sensitive information. (CVE-2021-1056)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.10:
  xserver-xorg-video-nvidia-390   390.141-0ubuntu0.20.10.1
  xserver-xorg-video-nvidia-440   450.102.04-0ubuntu0.20.10.1
  xserver-xorg-video-nvidia-450   450.102.04-0ubuntu0.20.10.1
  xserver-xorg-video-nvidia-455   460.32.03-0ubuntu0.20.10.1
  xserver-xorg-video-nvidia-460   460.32.03-0ubuntu0.20.10.1

Ubuntu 20.04 LTS:
  xserver-xorg-video-nvidia-390   390.141-0ubuntu0.20.04.1
  xserver-xorg-video-nvidia-440   450.102.04-0ubuntu0.20.04.1
  xserver-xorg-video-nvidia-450   450.102.04-0ubuntu0.20.04.1
  xserver-xorg-video-nvidia-455   460.32.03-0ubuntu0.20.04.1
  xserver-xorg-video-nvidia-460   460.32.03-0ubuntu0.20.04.1

Ubuntu 18.04 LTS:
  xserver-xorg-video-nvidia-390   390.141-0ubuntu0.18.04.1
  xserver-xorg-video-nvidia-440   450.102.04-0ubuntu0.18.04.1
  xserver-xorg-video-nvidia-450   450.102.04-0ubuntu0.18.04.1
  xserver-xorg-video-nvidia-455   460.32.03-0ubuntu0.18.04.1
  xserver-xorg-video-nvidia-460   460.32.03-0ubuntu0.18.04.1

This update uses a new upstream release, which includes additional
bug fixes. After a standard system update you need to reboot your
computer to make all the necessary changes.

References:
  https://usn.ubuntu.com/4689-1
  CVE-2021-1052, CVE-2021-1053, CVE-2021-1056

Package Information:
  https://launchpad.net/ubuntu/+source/nvidia-graphics-drivers-390/390.141-0ubuntu0.20.10.1
  https://launchpad.net/ubuntu/+source/nvidia-graphics-drivers-450/450.102.04-0ubuntu0.20.10.1
  https://launchpad.net/ubuntu/+source/nvidia-graphics-drivers-460/460.32.03-0ubuntu0.20.10.1
  https://launchpad.net/ubuntu/+source/nvidia-graphics-drivers-390/390.141-0ubuntu0.20.04.1
  https://launchpad.net/ubuntu/+source/nvidia-graphics-drivers-450/450.102.04-0ubuntu0.20.04.1
  https://launchpad.net/ubuntu/+source/nvidia-graphics-drivers-460/460.32.03-0ubuntu0.20.04.1
  https://launchpad.net/ubuntu/+source/nvidia-graphics-drivers-390/390.141-0ubuntu0.18.04.1
  https://launchpad.net/ubuntu/+source/nvidia-graphics-drivers-450/450.102.04-0ubuntu0.18.04.1
  https://launchpad.net/ubuntu/+source/nvidia-graphics-drivers-460/460.32.03-0ubuntu0.18.04.1