USN-4689-4: Linux kernel update

Publication date

21 January 2021

Overview

Several security issues were fixed in NVIDIA graphics drivers.


Packages

  • linux - Linux kernel
  • linux-aws - Linux kernel for Amazon Web Services (AWS) systems
  • linux-azure - Linux kernel for Microsoft Azure Cloud systems
  • linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
  • linux-hwe-5.4 - Linux hardware enablement (HWE) kernel
  • linux-hwe-5.8 - Linux hardware enablement (HWE) kernel
  • linux-oracle - Linux kernel for Oracle Cloud systems

Details

USN-4689-3 fixed vulnerabilities in the NVIDIA server 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...

USN-4689-3 fixed vulnerabilities in the NVIDIA server 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)


Update instructions

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

Learn more about how to get the fixes.

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.

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

Ubuntu Release Package Version
20.10 groovy linux-image-5.8.0-1017-oracle –  5.8.0-1017.18
linux-image-5.8.0-1019-azure –  5.8.0-1019.21
linux-image-5.8.0-1019-gcp –  5.8.0-1019.20
linux-image-5.8.0-1020-aws –  5.8.0-1020.22
linux-image-5.8.0-40-generic –  5.8.0-40.45
linux-image-5.8.0-40-lowlatency –  5.8.0-40.45
linux-image-aws –  5.8.0.1020.22
linux-image-azure –  5.8.0.1019.19
linux-image-gcp –  5.8.0.1019.19
linux-image-generic –  5.8.0.40.44
linux-image-gke –  5.8.0.1019.19
linux-image-lowlatency –  5.8.0.40.44
linux-image-oem-20.04 –  5.8.0.40.44
linux-image-oracle –  5.8.0.1017.17
linux-image-virtual –  5.8.0.40.44
20.04 focal linux-image-5.4.0-64-generic –  5.4.0-64.72
linux-image-5.4.0-64-lowlatency –  5.4.0-64.72
linux-image-5.8.0-40-generic –  5.8.0-40.45~20.04.1
linux-image-5.8.0-40-lowlatency –  5.8.0-40.45~20.04.1
linux-image-generic –  5.4.0.64.67
linux-image-generic-hwe-20.04 –  5.8.0.40.45~20.04.25
linux-image-generic-lpae-hwe-20.04 –  5.8.0.40.45~20.04.25
linux-image-lowlatency –  5.4.0.64.67
linux-image-lowlatency-hwe-20.04 –  5.8.0.40.45~20.04.25
linux-image-oem –  5.4.0.64.67
linux-image-oem-osp1 –  5.4.0.64.67
linux-image-virtual –  5.4.0.64.67
linux-image-virtual-hwe-20.04 –  5.8.0.40.45~20.04.25
18.04 bionic linux-image-4.15.0-134-generic –  4.15.0-134.138
linux-image-4.15.0-134-lowlatency –  4.15.0-134.138
linux-image-5.4.0-64-generic –  5.4.0-64.72~18.04.1
linux-image-5.4.0-64-lowlatency –  5.4.0-64.72~18.04.1
linux-image-generic –  4.15.0.134.121
linux-image-generic-hwe-18.04 –  5.4.0.64.72~18.04.59
linux-image-lowlatency –  4.15.0.134.121
linux-image-lowlatency-hwe-18.04 –  5.4.0.64.72~18.04.59
linux-image-oem –  5.4.0.64.72~18.04.59
linux-image-oem-osp1 –  5.4.0.64.72~18.04.59
linux-image-virtual –  4.15.0.134.121
linux-image-virtual-hwe-18.04 –  5.4.0.64.72~18.04.59

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