A Linux kernel security update has been released for Ubuntu Linux 20.04 LTS, 19.10, and 18.04 LTS.

USN-4404-2: Linux kernel vulnerabilities

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Ubuntu Security Notice USN-4404-2
June 25, 2020

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

- Ubuntu 20.04 LTS
- Ubuntu 19.10
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in the NVIDIA graphics driver
kernel modules.

Software Description:
- 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-oracle: Linux kernel for Oracle Cloud systems
- linux-aws-5.3: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure-5.3: Linux kernel for Microsoft Azure Cloud systems
- linux-gcp-5.3: Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe: Linux hardware enablement (HWE) kernel
- linux-oem: Linux kernel for OEM systems
- linux-oem-osp1: Linux kernel for OEM systems
- linux-oracle-5.3: Linux kernel for Oracle Cloud systems

Details:

USN-4404-1 fixed vulnerabilities in the NVIDIA graphics drivers.
This update provides the corresponding updates for the NVIDIA Linux
DKMS kernel modules.

Original advisory details:

Thomas E. Carroll discovered that the NVIDIA Cuda grpahics driver did not
properly perform access control when performing IPC. An attacker could use
this to cause a denial of service or possibly execute arbitrary code.
(CVE-2020-5963)

It was discovered that the UVM driver in the NVIDIA graphics driver
contained a race condition. A local attacker could use this to cause a
denial of service. (CVE-2020-5967)

It was discovered that the NVIDIA virtual GPU guest drivers contained
an unspecified vulnerability that could potentially lead to privileged
operation execution. An attacker could use this to cause a denial of
service. (CVE-2020-5973)

Update instructions:

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

Ubuntu 20.04 LTS:
linux-image-5.4.0-1017-aws 5.4.0-1017.17
linux-image-5.4.0-1018-gcp 5.4.0-1018.18
linux-image-5.4.0-1018-oracle 5.4.0-1018.18
linux-image-5.4.0-1019-azure 5.4.0-1019.19
linux-image-5.4.0-39-generic 5.4.0-39.43
linux-image-5.4.0-39-generic-lpae 5.4.0-39.43
linux-image-5.4.0-39-lowlatency 5.4.0-39.43
linux-image-aws 5.4.0.1017.18
linux-image-azure 5.4.0.1019.18
linux-image-gcp 5.4.0.1018.16
linux-image-generic 5.4.0.39.42
linux-image-generic-hwe-20.04 5.4.0.39.42
linux-image-generic-lpae 5.4.0.39.42
linux-image-generic-lpae-hwe-20.04 5.4.0.39.42
linux-image-gke 5.4.0.1018.16
linux-image-lowlatency 5.4.0.39.42
linux-image-lowlatency-hwe-20.04 5.4.0.39.42
linux-image-oem 5.4.0.39.42
linux-image-oem-osp1 5.4.0.39.42
linux-image-oracle 5.4.0.1018.16
linux-image-virtual 5.4.0.39.42
linux-image-virtual-hwe-20.04 5.4.0.39.42

Ubuntu 19.10:
linux-image-5.3.0-1027-oracle 5.3.0-1027.29
linux-image-5.3.0-1028-aws 5.3.0-1028.30
linux-image-5.3.0-1029-gcp 5.3.0-1029.31
linux-image-5.3.0-61-generic 5.3.0-61.55
linux-image-5.3.0-61-generic-lpae 5.3.0-61.55
linux-image-5.3.0-61-lowlatency 5.3.0-61.55
linux-image-5.3.0-61-snapdragon 5.3.0-61.55
linux-image-aws 5.3.0.1028.38
linux-image-gcp 5.3.0.1029.39
linux-image-generic 5.3.0.61.51
linux-image-generic-lpae 5.3.0.61.51
linux-image-gke 5.3.0.1029.39
linux-image-lowlatency 5.3.0.61.51
linux-image-oracle 5.3.0.1027.42
linux-image-snapdragon 5.3.0.61.51
linux-image-virtual 5.3.0.61.51

Ubuntu 18.04 LTS:
linux-image-4.15.0-1047-oracle 4.15.0-1047.51
linux-image-4.15.0-1076-aws 4.15.0-1076.80
linux-image-4.15.0-108-generic 4.15.0-108.109
linux-image-4.15.0-108-generic-lpae 4.15.0-108.109
linux-image-4.15.0-108-lowlatency 4.15.0-108.109
linux-image-4.15.0-1090-oem 4.15.0-1090.100
linux-image-5.0.0-1062-oem-osp1 5.0.0-1062.67
linux-image-5.3.0-1027-oracle 5.3.0-1027.29~18.04.1
linux-image-5.3.0-1028-aws 5.3.0-1028.30~18.04.1
linux-image-5.3.0-1029-gcp 5.3.0-1029.31~18.04.1
linux-image-5.3.0-1031-azure 5.3.0-1031.32~18.04.1
linux-image-5.3.0-61-generic 5.3.0-61.55~18.04.1
linux-image-5.3.0-61-generic-lpae 5.3.0-61.55~18.04.1
linux-image-5.3.0-61-lowlatency 5.3.0-61.55~18.04.1
linux-image-aws 5.3.0.1028.26
linux-image-aws-lts-18.04 4.15.0.1076.78
linux-image-azure 5.3.0.1031.27
linux-image-gcp 5.3.0.1029.23
linux-image-generic 4.15.0.108.96
linux-image-generic-hwe-18.04 5.3.0.61.114
linux-image-generic-lpae 4.15.0.108.96
linux-image-generic-lpae-hwe-18.04 5.3.0.61.114
linux-image-gkeop-5.3 5.3.0.61.114
linux-image-lowlatency 4.15.0.108.96
linux-image-lowlatency-hwe-18.04 5.3.0.61.114
linux-image-oem 4.15.0.1090.93
linux-image-oem-osp1 5.0.0.1062.60
linux-image-oracle 5.3.0.1027.24
linux-image-oracle-edge 5.3.0.1027.24
linux-image-oracle-lts-18.04 4.15.0.1047.56
linux-image-powerpc-e500mc 4.15.0.108.96
linux-image-powerpc-smp 4.15.0.108.96
linux-image-powerpc64-emb 4.15.0.108.96
linux-image-powerpc64-smp 4.15.0.108.96
linux-image-snapdragon-hwe-18.04 5.3.0.61.114
linux-image-virtual 4.15.0.108.96
linux-image-virtual-hwe-18.04 5.3.0.61.114

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:
  https://usn.ubuntu.com/4404-2
  https://usn.ubuntu.com/4404-1
CVE-2020-5963, CVE-2020-5967, CVE-2020-5973

Package Information:
  https://launchpad.net/ubuntu/+source/linux/5.4.0-39.43
  https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1017.17
  https://launchpad.net/ubuntu/+source/linux-azure/5.4.0-1019.19
  https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1018.18
  https://launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1018.18
  https://launchpad.net/ubuntu/+source/linux/5.3.0-61.55
  https://launchpad.net/ubuntu/+source/linux-aws/5.3.0-1028.30
  https://launchpad.net/ubuntu/+source/linux-gcp/5.3.0-1029.31
  https://launchpad.net/ubuntu/+source/linux-oracle/5.3.0-1027.29
  https://launchpad.net/ubuntu/+source/linux/4.15.0-108.109
  https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1076.80
  https://launchpad.net/ubuntu/+source/linux-aws-5.3/5.3.0-1028.30~18.04.1
  https://launchpad.net/ubuntu/+source/linux-azure-5.3/5.3.0-1031.32~18.04.1
  https://launchpad.net/ubuntu/+source/linux-gcp-5.3/5.3.0-1029.31~18.04.1
  https://launchpad.net/ubuntu/+source/linux-hwe/5.3.0-61.55~18.04.1
  https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1090.100
  https://launchpad.net/ubuntu/+source/linux-oem-osp1/5.0.0-1062.67
  https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1047.51
  https://launchpad.net/ubuntu/+source/linux-oracle-5.3/5.3.0-1027.29~18.04.1