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USN-4689-2: Linux kernel vulnerabilities

11 January 2021

Several security issues were fixed in the Linux kernel.

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Releases

Packages

Details

USN-4689-1 fixed vulnerabilities in the NVIDIA graphics drivers.
This update provides the corresponding updates for the NVIDIA Linux
DKMS kernel modules.

Original advisory 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)

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

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

Ubuntu 20.10
Ubuntu 20.04
Ubuntu 18.04

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

Related notices

  • USN-4689-1: libnvidia-compute-440, libnvidia-extra-460, libnvidia-ifr1-440, nvidia-headless-no-dkms-440, libnvidia-encode-390, libnvidia-encode-460, libnvidia-cfg1-440, libnvidia-fbc1-460, nvidia-utils-390, nvidia-driver-460, libnvidia-common-440, nvidia-headless-460, nvidia-headless-390, xserver-xorg-video-nvidia-450, nvidia-dkms-440, nvidia-headless-no-dkms-455, libnvidia-decode-440, nvidia-driver-390, nvidia-headless-440, libnvidia-common-390, xserver-xorg-video-nvidia-455, libnvidia-gl-460, libnvidia-ifr1-390, nvidia-compute-utils-450, libnvidia-cfg1-450, nvidia-compute-utils-455, libnvidia-compute-455, libnvidia-common-455, nvidia-kernel-source-440, xserver-xorg-video-nvidia-460, nvidia-utils-455, nvidia-headless-450, nvidia-graphics-drivers-460, nvidia-kernel-source-390, nvidia-kernel-common-440, nvidia-utils-450, libnvidia-compute-460, libnvidia-fbc1-455, libnvidia-decode-450, libnvidia-gl-455, libnvidia-encode-450, nvidia-headless-no-dkms-450, libnvidia-decode-455, nvidia-headless-no-dkms-390, nvidia-dkms-390, nvidia-driver-440, nvidia-graphics-drivers-450, libnvidia-decode-390, libnvidia-cfg1-455, libnvidia-gl-450, libnvidia-decode-460, libnvidia-common-450, xserver-xorg-video-nvidia-390, libnvidia-ifr1-460, nvidia-384, libnvidia-compute-450, libnvidia-gl-440, libnvidia-compute-390, libcuda1-384, libnvidia-fbc1-450, libnvidia-extra-450, libnvidia-fbc1-440, libnvidia-ifr1-450, nvidia-driver-455, nvidia-graphics-drivers-390, nvidia-kernel-common-460, nvidia-kernel-source-455, nvidia-headless-455, nvidia-kernel-common-450, libnvidia-cfg1-390, nvidia-dkms-455, libnvidia-encode-440, nvidia-kernel-source-450, libnvidia-extra-440, libnvidia-common-460, libnvidia-encode-455, libnvidia-fbc1-390, nvidia-utils-460, nvidia-opencl-icd-384, nvidia-dkms-460, libnvidia-gl-390, nvidia-kernel-source-460, nvidia-compute-utils-460, nvidia-headless-no-dkms-460, libnvidia-cfg1-460, nvidia-384-dev, nvidia-utils-440, nvidia-libopencl1-384, libnvidia-ifr1-455, nvidia-compute-utils-440, nvidia-dkms-450, xserver-xorg-video-nvidia-440, libnvidia-extra-455, nvidia-kernel-common-390, nvidia-kernel-common-455, nvidia-compute-utils-390, nvidia-driver-450
  • USN-4689-3: libnvidia-extra-450-server, libnvidia-cfg1-450-server, xserver-xorg-video-nvidia-450-server, libnvidia-gl-440-server, nvidia-graphics-drivers-450-server, libnvidia-gl-450-server, nvidia-kernel-common-450-server, libnvidia-ifr1-440-server, nvidia-utils-418-server, libnvidia-decode-440-server, libnvidia-cfg1-418-server, nvidia-driver-450-server, nvidia-kernel-common-440-server, nvidia-utils-440-server, libnvidia-encode-450-server, libnvidia-compute-440-server, nvidia-compute-utils-418-server, nvidia-dkms-450-server, libnvidia-decode-418-server, nvidia-headless-no-dkms-440-server, nvidia-dkms-440-server, libnvidia-common-418-server, libnvidia-cfg1-440-server, nvidia-compute-utils-450-server, xserver-xorg-video-nvidia-418-server, nvidia-driver-440-server, nvidia-headless-no-dkms-418-server, libnvidia-common-450-server, libnvidia-fbc1-450-server, nvidia-graphics-drivers-418-server, libnvidia-common-440-server, nvidia-kernel-source-440-server, libnvidia-fbc1-440-server, libnvidia-fbc1-418-server, nvidia-dkms-418-server, nvidia-utils-450-server, libnvidia-encode-440-server, nvidia-headless-440-server, libnvidia-extra-440-server, libnvidia-compute-418-server, nvidia-compute-utils-440-server, libnvidia-ifr1-450-server, nvidia-kernel-source-450-server, xserver-xorg-video-nvidia-440-server, nvidia-kernel-common-418-server, nvidia-headless-no-dkms-450-server, libnvidia-compute-450-server, libnvidia-decode-450-server, libnvidia-encode-418-server, nvidia-driver-418-server, libnvidia-ifr1-418-server, nvidia-headless-418-server, libnvidia-gl-418-server, nvidia-kernel-source-418-server, nvidia-headless-450-server
  • USN-4689-4: linux-azure, linux-image-4.15.0-134-generic-lpae, linux-image-generic-lpae-hwe-16.04, linux-image-5.8.0-40-generic, linux-image-5.4.0-64-generic, linux-image-lowlatency-hwe-20.04, linux-oracle, linux-image-generic-lpae-hwe-16.04-edge, linux-image-oem-20.04, linux-image-5.8.0-1020-aws, linux-image-generic-hwe-16.04-edge, linux-image-generic-hwe-20.04-edge, linux-image-virtual, linux-image-virtual-hwe-18.04-edge, linux-image-lowlatency-hwe-20.04-edge, linux-image-lowlatency-hwe-16.04, linux-image-oem, linux-image-generic-hwe-16.04, linux-image-generic-64k-hwe-20.04, linux-image-azure, linux-image-generic-lpae, linux-image-5.8.0-40-lowlatency, linux-image-generic-hwe-20.04, linux-gcp, linux, linux-image-generic-hwe-18.04, linux-image-generic-lpae-hwe-18.04, linux-image-lowlatency-hwe-18.04-edge, linux-image-5.4.0-64-lowlatency, linux-image-oem-osp1, linux-hwe-5.4, linux-image-virtual-hwe-20.04-edge, linux-image-generic-lpae-hwe-18.04-edge, linux-image-lowlatency-hwe-18.04, linux-image-virtual-hwe-16.04, linux-image-5.8.0-1019-gcp, linux-image-generic-lpae-hwe-20.04, linux-image-5.8.0-40-generic-64k, linux-image-virtual-hwe-16.04-edge, linux-image-gcp, linux-image-4.15.0-134-generic, linux-image-oracle, linux-hwe-5.8, linux-image-virtual-hwe-18.04, linux-image-aws, linux-image-lowlatency, linux-image-lowlatency-hwe-16.04-edge, linux-image-5.4.0-64-generic-lpae, linux-image-5.8.0-1017-oracle, linux-image-generic-64k, linux-image-generic-lpae-hwe-20.04-edge, linux-image-virtual-hwe-20.04, linux-image-5.8.0-40-generic-lpae, linux-image-generic, linux-image-snapdragon-hwe-18.04-edge, linux-aws, linux-image-gke, linux-image-snapdragon-hwe-18.04, linux-image-generic-hwe-18.04-edge, linux-image-4.15.0-134-lowlatency, linux-image-generic-64k-hwe-20.04-edge, linux-image-5.8.0-1019-azure

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