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==========================================================================
Ubuntu Security Notice USN-4320-1
April 06, 2020

linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerability
==========================================================================

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

– Ubuntu 16.04 LTS
– Ubuntu 14.04 ESM

Summary:

The system could be made to crash or expose sensitive information.

Software Description:
– linux: Linux kernel
– linux-aws: Linux kernel for Amazon Web Services (AWS) systems
– linux-kvm: Linux kernel for cloud environments
– linux-raspi2: Linux kernel for Raspberry Pi 2
– linux-snapdragon: Linux kernel for Snapdragon processors
– linux-lts-xenial: Linux hardware enablement kernel from Xenial for
Trusty

Details:

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).

Update instructions:

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

Ubuntu 16.04 LTS:
linux-image-4.4.0-1069-kvm 4.4.0-1069.76
linux-image-4.4.0-1105-aws 4.4.0-1105.116
linux-image-4.4.0-1131-raspi2 4.4.0-1131.140
linux-image-4.4.0-1135-snapdragon 4.4.0-1135.143
linux-image-4.4.0-177-generic 4.4.0-177.207
linux-image-4.4.0-177-generic-lpae 4.4.0-177.207
linux-image-4.4.0-177-lowlatency 4.4.0-177.207
linux-image-4.4.0-177-powerpc-e500mc 4.4.0-177.207
linux-image-4.4.0-177-powerpc-smp 4.4.0-177.207
linux-image-4.4.0-177-powerpc64-emb 4.4.0-177.207
linux-image-4.4.0-177-powerpc64-smp 4.4.0-177.207
linux-image-aws 4.4.0.1105.109
linux-image-generic 4.4.0.177.185
linux-image-generic-lpae 4.4.0.177.185
linux-image-kvm 4.4.0.1069.69
linux-image-lowlatency 4.4.0.177.185
linux-image-powerpc-e500mc 4.4.0.177.185
linux-image-powerpc-smp 4.4.0.177.185
linux-image-powerpc64-emb 4.4.0.177.185
linux-image-powerpc64-smp 4.4.0.177.185
linux-image-raspi2 4.4.0.1131.131
linux-image-snapdragon 4.4.0.1135.127
linux-image-virtual 4.4.0.177.185

Ubuntu 14.04 ESM:
linux-image-4.4.0-1065-aws 4.4.0-1065.69
linux-image-4.4.0-177-generic 4.4.0-177.207~14.04.1
linux-image-4.4.0-177-generic-lpae 4.4.0-177.207~14.04.1
linux-image-4.4.0-177-lowlatency 4.4.0-177.207~14.04.1
linux-image-4.4.0-177-powerpc-e500mc 4.4.0-177.207~14.04.1
linux-image-4.4.0-177-powerpc-smp 4.4.0-177.207~14.04.1
linux-image-4.4.0-177-powerpc64-emb 4.4.0-177.207~14.04.1
linux-image-4.4.0-177-powerpc64-smp 4.4.0-177.207~14.04.1
linux-image-aws 4.4.0.1065.66
linux-image-generic-lpae-lts-xenial 4.4.0.177.156
linux-image-generic-lts-xenial 4.4.0.177.156
linux-image-lowlatency-lts-xenial 4.4.0.177.156
linux-image-powerpc-e500mc-lts-xenial 4.4.0.177.156
linux-image-powerpc-smp-lts-xenial 4.4.0.177.156
linux-image-powerpc64-emb-lts-xenial 4.4.0.177.156
linux-image-powerpc64-smp-lts-xenial 4.4.0.177.156
linux-image-virtual-lts-xenial 4.4.0.177.156

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/4320-1
CVE-2020-8428

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.4.0-177.207
https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1105.116
https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1069.76
https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1131.140
https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1135.143

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—
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==========================================================================
Ubuntu Security Notice USN-4318-1
April 06, 2020

linux, linux-hwe vulnerabilities
==========================================================================

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

– Ubuntu 18.04 LTS
– Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
– linux: Linux kernel
– linux-hwe: Linux hardware enablement (HWE) kernel

Details:

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)

Gustavo Romero and Paul Mackerras discovered that the KVM implementation in
the Linux kernel for PowerPC processors did not properly keep guest state
separate from host state. A local attacker in a KVM guest could use this to
cause a denial of service (host system crash). (CVE-2020-8834)

Shijie Luo discovered that the ext4 file system implementation in the Linux
kernel did not properly check for a too-large journal size. An attacker
could use this to construct a malicious ext4 image that, when mounted,
could cause a denial of service (soft lockup). (CVE-2020-8992)

Update instructions:

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

Ubuntu 18.04 LTS:
linux-image-4.15.0-96-generic 4.15.0-96.97
linux-image-4.15.0-96-generic-lpae 4.15.0-96.97
linux-image-4.15.0-96-lowlatency 4.15.0-96.97
linux-image-generic 4.15.0.96.87
linux-image-generic-lpae 4.15.0.96.87
linux-image-lowlatency 4.15.0.96.87
linux-image-powerpc-e500mc 4.15.0.96.87
linux-image-powerpc-smp 4.15.0.96.87
linux-image-powerpc64-emb 4.15.0.96.87
linux-image-powerpc64-smp 4.15.0.96.87
linux-image-virtual 4.15.0.96.87

Ubuntu 16.04 LTS:
linux-image-4.15.0-96-generic 4.15.0-96.97~16.04.1
linux-image-4.15.0-96-generic-lpae 4.15.0-96.97~16.04.1
linux-image-4.15.0-96-lowlatency 4.15.0-96.97~16.04.1
linux-image-generic-hwe-16.04 4.15.0.96.104
linux-image-generic-lpae-hwe-16.04 4.15.0.96.104
linux-image-lowlatency-hwe-16.04 4.15.0.96.104
linux-image-oem 4.15.0.96.104
linux-image-virtual-hwe-16.04 4.15.0.96.104

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/4318-1
CVE-2020-8428, CVE-2020-8834, CVE-2020-8992

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.15.0-96.97
https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-96.97~16.04.1

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==========================================================================
Ubuntu Security Notice USN-4319-1
April 06, 2020

linux, linux-aws, linux-gcp, linux-gcp-5.3, linux-hwe, linux-kvm,
linux-oracle, linux-oracle-5.3, linux-raspi2, linux-raspi2-5.3
vulnerabilities
==========================================================================

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

– Ubuntu 19.10
– Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
– linux: Linux kernel
– linux-aws: Linux kernel for Amazon Web Services (AWS) systems
– linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
– linux-kvm: Linux kernel for cloud environments
– linux-oracle: Linux kernel for Oracle Cloud systems
– linux-raspi2: Linux kernel for Raspberry Pi 2
– linux-gcp-5.3: Linux kernel for Google Cloud Platform (GCP) systems
– linux-hwe: Linux hardware enablement (HWE) kernel
– linux-oracle-5.3: Linux kernel Oracle Cloud systems
– linux-raspi2-5.3: Linux kernel for Raspberry Pi 2

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)

Update instructions:

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

Ubuntu 19.10:
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-5.3.0-1022-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-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

Ubuntu 18.04 LTS:
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-5.3.0-1022-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-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

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/4319-1
CVE-2019-19046, CVE-2020-8428

Package Information:
https://launchpad.net/ubuntu/+source/linux/5.3.0-46.38
https://launchpad.net/ubuntu/+source/linux-aws/5.3.0-1016.17
https://launchpad.net/ubuntu/+source/linux-gcp/5.3.0-1017.18
https://launchpad.net/ubuntu/+source/linux-kvm/5.3.0-1015.16
https://launchpad.net/ubuntu/+source/linux-oracle/5.3.0-1014.15
https://launchpad.net/ubuntu/+source/linux-raspi2/5.3.0-1022.24
https://launchpad.net/ubuntu/+source/linux-gcp-5.3/5.3.0-1017.18~18.04.1
https://launchpad.net/ubuntu/+source/linux-hwe/5.3.0-46.38~18.04.1
https://launchpad.net/ubuntu/+source/linux-oracle-5.3/5.3.0-1014.15~18.04.1
https://launchpad.net/ubuntu/+source/linux-raspi2-5.3/5.3.0-1022.24~18.04.1

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