1. Ubuntu Security Notices
  2. USN-4689-2

USN-4689-2: Linux kernel vulnerabilities

Publication date

11 January 2021

Overview

Several security issues were fixed in the Linux kernel.

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...

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)

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-5.8.0-1015-oracle –  5.8.0-1015.16
linux-image-5.8.0-1016-gcp –  5.8.0-1016.17
linux-image-5.8.0-1017-azure –  5.8.0-1017.19
linux-image-5.8.0-1018-aws –  5.8.0-1018.20
linux-image-5.8.0-36-generic –  5.8.0-36.40
linux-image-5.8.0-36-lowlatency –  5.8.0-36.40
linux-image-aws –  5.8.0.1018.20
linux-image-azure –  5.8.0.1017.17
linux-image-gcp –  5.8.0.1016.16
linux-image-generic –  5.8.0.36.40
linux-image-gke –  5.8.0.1016.16
linux-image-lowlatency –  5.8.0.36.40
linux-image-oracle –  5.8.0.1015.15
linux-image-virtual –  5.8.0.36.40
20.04 focal linux-image-5.4.0-1034-gcp –  5.4.0-1034.37
linux-image-5.4.0-1035-aws –  5.4.0-1035.37
linux-image-5.4.0-1035-oracle –  5.4.0-1035.38
linux-image-5.4.0-1036-azure –  5.4.0-1036.38
linux-image-5.4.0-60-generic –  5.4.0-60.67
linux-image-5.4.0-60-lowlatency –  5.4.0-60.67
linux-image-5.6.0-1042-oem –  5.6.0-1042.46
linux-image-5.8.0-36-generic –  5.8.0-36.40~20.04.1
linux-image-5.8.0-36-lowlatency –  5.8.0-36.40~20.04.1
linux-image-aws –  5.4.0.1035.36
linux-image-azure –  5.4.0.1036.34
linux-image-gcp –  5.4.0.1034.43
linux-image-generic –  5.4.0.60.63
linux-image-generic-hwe-20.04 –  5.8.0.36.40~20.04.21
linux-image-lowlatency –  5.4.0.60.63
linux-image-lowlatency-hwe-20.04 –  5.8.0.36.40~20.04.21
linux-image-oem –  5.4.0.60.63
linux-image-oem-20.04 –  5.6.0.1042.38
linux-image-oem-osp1 –  5.4.0.60.63
linux-image-oracle –  5.4.0.1035.32
linux-image-virtual –  5.4.0.60.63
linux-image-virtual-hwe-20.04 –  5.8.0.36.40~20.04.21
18.04 bionic linux-image-4.15.0-1063-oracle –  4.15.0-1063.70
linux-image-4.15.0-1092-aws –  4.15.0-1092.98
linux-image-4.15.0-1104-azure –  4.15.0-1104.116
linux-image-4.15.0-130-generic –  4.15.0-130.134
linux-image-4.15.0-130-lowlatency –  4.15.0-130.134
linux-image-5.4.0-1034-gcp –  5.4.0-1034.37~18.04.1
linux-image-5.4.0-1035-aws –  5.4.0-1035.37~18.04.1
linux-image-5.4.0-1035-oracle –  5.4.0-1035.38~18.04.1
linux-image-5.4.0-1036-azure –  5.4.0-1036.38~18.04.1
linux-image-5.4.0-60-generic –  5.4.0-60.67~18.04.1
linux-image-5.4.0-60-lowlatency –  5.4.0-60.67~18.04.1
linux-image-aws –  5.4.0.1035.20
linux-image-aws-lts-18.04 –  4.15.0.1092.94
linux-image-azure –  5.4.0.1036.18
linux-image-azure-lts-18.04 –  4.15.0.1104.77
linux-image-gcp –  5.4.0.1034.22
linux-image-generic –  4.15.0.130.117
linux-image-generic-hwe-18.04 –  5.4.0.60.67~18.04.55
linux-image-lowlatency –  4.15.0.130.117
linux-image-lowlatency-hwe-18.04 –  5.4.0.60.67~18.04.55
linux-image-oem –  5.4.0.60.67~18.04.55
linux-image-oem-osp1 –  5.4.0.60.67~18.04.55
linux-image-oracle –  5.4.0.1035.38~18.04.19
linux-image-oracle-lts-18.04 –  4.15.0.1063.73
linux-image-virtual –  4.15.0.130.117
linux-image-virtual-hwe-18.04 –  5.4.0.60.67~18.04.55

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References

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