1. Ubuntu Security Notices
  2. USN-4319-1

USN-4319-1: Linux kernel vulnerabilities

Publication date

10 April 2020

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

Details

It was discovered that the IPMI message handler implementation in the Linux
kernel did not properly deallocate memory in certain situations. A local
attacker could use this to cause a denial of service (kernel memory
exhaustion). (CVE-2019-19046)

Al Viro discovered that the vfs layer in the Linux kernel contained a use-
after-free vulnerability. A local attacker could use this to cause a denial
of service (system crash) or possibly expose sensitive information (kernel
memory). (CVE-2020-8428)

It was discovered that the IPMI message handler implementation in the Linux
kernel did not properly deallocate memory in certain situations. A local
attacker could use this to cause a denial of service (kernel memory
exhaustion). (CVE-2019-19046)

Al Viro discovered that the vfs layer in the Linux kernel contained a use-
after-free vulnerability. A local attacker could use this to cause a denial
of service (system crash) or possibly expose sensitive information (kernel
memory). (CVE-2020-8428)

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
19.10 eoan linux-image-5.3.0-1014-oracle –  5.3.0-1014.15
linux-image-5.3.0-1015-kvm –  5.3.0-1015.16
linux-image-5.3.0-1016-aws –  5.3.0-1016.17
linux-image-5.3.0-1017-gcp –  5.3.0-1017.18
linux-image-5.3.0-1019-azure –  5.3.0-1019.20
linux-image-5.3.0-1022-raspi2 –  5.3.0-1022.24
linux-image-5.3.0-46-generic –  5.3.0-46.38
linux-image-5.3.0-46-generic-lpae –  5.3.0-46.38
linux-image-5.3.0-46-lowlatency –  5.3.0-46.38
linux-image-5.3.0-46-snapdragon –  5.3.0-46.38
linux-image-aws –  5.3.0.1016.18
linux-image-azure –  5.3.0.1019.38
linux-image-gcp –  5.3.0.1017.18
linux-image-generic –  5.3.0.46.39
linux-image-generic-lpae –  5.3.0.46.39
linux-image-gke –  5.3.0.1017.18
linux-image-kvm –  5.3.0.1015.17
linux-image-lowlatency –  5.3.0.46.39
linux-image-oracle –  5.3.0.1014.15
linux-image-raspi2 –  5.3.0.1022.19
linux-image-snapdragon –  5.3.0.46.39
linux-image-virtual –  5.3.0.46.39
18.04 bionic linux-image-5.3.0-1014-oracle –  5.3.0-1014.15~18.04.1
linux-image-5.3.0-1017-gcp –  5.3.0-1017.18~18.04.1
linux-image-5.3.0-1019-azure –  5.3.0-1019.20~18.04.1
linux-image-5.3.0-1022-raspi2 –  5.3.0-1022.24~18.04.1
linux-image-5.3.0-46-generic –  5.3.0-46.38~18.04.1
linux-image-5.3.0-46-generic-lpae –  5.3.0-46.38~18.04.1
linux-image-5.3.0-46-lowlatency –  5.3.0-46.38~18.04.1
linux-image-azure-edge –  5.3.0.1019.19
linux-image-gcp-edge –  5.3.0.1017.16
linux-image-generic-hwe-18.04 –  5.3.0.46.102
linux-image-generic-lpae-hwe-18.04 –  5.3.0.46.102
linux-image-lowlatency-hwe-18.04 –  5.3.0.46.102
linux-image-oracle-edge –  5.3.0.1014.13
linux-image-raspi2-hwe-18.04 –  5.3.0.1022.11
linux-image-snapdragon-hwe-18.04 –  5.3.0.46.102
linux-image-virtual-hwe-18.04 –  5.3.0.46.102

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References

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