The following kernel updates has been released for Ubuntu Linux:

USN-3871-2: Linux kernel regression
USN-3871-3: Linux kernel (AWS, GCP, KVM, OEM, Raspberry Pi 2) vulnerabilities
USN-3871-4: Linux kernel (HWE) vulnerabilities
USN-3878-1: Linux kernel vulnerabilities
USN-3879-1: Linux kernel vulnerabilities
USN-3879-2: Linux kernel (Xenial HWE) vulnerabilities
USN-3880-1: Linux kernel vulnerabilities
USN-3880-2: Linux kernel (Trusty HWE) vulnerabilities

USN-3871-2: Linux kernel regression

=========================================================================
Ubuntu Security Notice USN-3871-2
January 31, 2019

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

- Ubuntu 18.04 LTS

Summary:

Multiple regressions were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel

Details:

USN-3871-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04
LTS. Unfortunately, that update introduced regressions with docking
station displays and mounting ext4 file systems with the meta_bg
option enabled. This update fixes the problems.

We apologize for the inconvenience.

Original advisory details:

Wen Xu discovered that a use-after-free vulnerability existed in the ext4
filesystem implementation in the Linux kernel. An attacker could use this
to construct a malicious ext4 image that, when mounted, could cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2018-10876, CVE-2018-10879)

Wen Xu discovered that a buffer overflow existed in the ext4 filesystem
implementation in the Linux kernel. An attacker could use this to construct
a malicious ext4 image that, when mounted, could cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2018-10877)

Wen Xu discovered that an out-of-bounds write vulnerability existed in the
ext4 filesystem implementation in the Linux kernel. An attacker could use
this to construct a malicious ext4 image that, when mounted, could cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2018-10878, CVE-2018-10882)

Wen Xu discovered that the ext4 filesystem implementation in the Linux
kernel did not properly ensure that xattr information remained in inode
bodies. An attacker could use this to construct a malicious ext4 image
that, when mounted, could cause a denial of service (system crash).
(CVE-2018-10880)

Wen Xu discovered that the ext4 file system implementation in the Linux
kernel could possibly perform an out of bounds write when updating the
journal for an inline file. An attacker could use this to construct a
malicious ext4 image that, when mounted, could cause a denial of service
(system crash). (CVE-2018-10883)

It was discovered that a race condition existed in the vsock address family
implementation of the Linux kernel that could lead to a use-after-free
condition. A local attacker in a guest virtual machine could use this to
expose sensitive information (host machine kernel memory). (CVE-2018-14625)

Cfir Cohen discovered that a use-after-free vulnerability existed in the
KVM implementation of the Linux kernel, when handling interrupts in
environments where nested virtualization is in use (nested KVM
virtualization is not enabled by default in Ubuntu kernels). A local
attacker in a guest VM could possibly use this to gain administrative
privileges in a host machine. (CVE-2018-16882)

Jann Horn discovered that the procfs file system implementation in the
Linux kernel did not properly restrict the ability to inspect the kernel
stack of an arbitrary task. A local attacker could use this to expose
sensitive information. (CVE-2018-17972)

Jann Horn discovered that the mremap() system call in the Linux kernel did
not properly flush the TLB when completing, potentially leaving access to a
physical page after it has been released to the page allocator. A local
attacker could use this to cause a denial of service (system crash), expose
sensitive information, or possibly execute arbitrary code. (CVE-2018-18281)

Wei Wu discovered that the KVM implementation in the Linux kernel did not
properly ensure that ioapics were initialized. A local attacker could use
this to cause a denial of service (system crash). (CVE-2018-19407)

It was discovered that the debug interface for the Linux kernel's HID
subsystem did not properly perform bounds checking in some situations. An
attacker with access to debugfs could use this to cause a denial of service
or possibly gain additional privileges. (CVE-2018-9516)

Update instructions:

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

Ubuntu 18.04 LTS:
linux-image-4.15.0-45-generic 4.15.0-45.48
linux-image-4.15.0-45-generic-lpae 4.15.0-45.48
linux-image-4.15.0-45-lowlatency 4.15.0-45.48
linux-image-4.15.0-45-snapdragon 4.15.0-45.48
linux-image-generic 4.15.0.45.47
linux-image-generic-lpae 4.15.0.45.47
linux-image-lowlatency 4.15.0.45.47
linux-image-snapdragon 4.15.0.45.47

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/usn/usn-3871-2
https://usn.ubuntu.com/usn/usn-3871-1
https://launchpad.net/bugs/1813663, https://launchpad.net/bugs/1813727

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.15.0-45.48

USN-3871-3: Linux kernel (AWS, GCP, KVM, OEM, Raspberry Pi 2) vulnerabilities

=========================================================================
Ubuntu Security Notice USN-3871-3
February 04, 2019

linux-aws, linux-gcp, linux-kvm, linux-oem, linux-raspi2 vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- 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-oem: Linux kernel for OEM processors
- linux-raspi2: Linux kernel for Raspberry Pi 2

Details:

Wen Xu discovered that a use-after-free vulnerability existed in the ext4
filesystem implementation in the Linux kernel. An attacker could use this
to construct a malicious ext4 image that, when mounted, could cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2018-10876, CVE-2018-10879)

Wen Xu discovered that a buffer overflow existed in the ext4 filesystem
implementation in the Linux kernel. An attacker could use this to construct
a malicious ext4 image that, when mounted, could cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2018-10877)

Wen Xu discovered that an out-of-bounds write vulnerability existed in the
ext4 filesystem implementation in the Linux kernel. An attacker could use
this to construct a malicious ext4 image that, when mounted, could cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2018-10878, CVE-2018-10882)

Wen Xu discovered that the ext4 filesystem implementation in the Linux
kernel did not properly ensure that xattr information remained in inode
bodies. An attacker could use this to construct a malicious ext4 image
that, when mounted, could cause a denial of service (system crash).
(CVE-2018-10880)

Wen Xu discovered that the ext4 file system implementation in the Linux
kernel could possibly perform an out of bounds write when updating the
journal for an inline file. An attacker could use this to construct a
malicious ext4 image that, when mounted, could cause a denial of service
(system crash). (CVE-2018-10883)

It was discovered that a race condition existed in the vsock address family
implementation of the Linux kernel that could lead to a use-after-free
condition. A local attacker in a guest virtual machine could use this to
expose sensitive information (host machine kernel memory). (CVE-2018-14625)

Cfir Cohen discovered that a use-after-free vulnerability existed in the
KVM implementation of the Linux kernel, when handling interrupts in
environments where nested virtualization is in use (nested KVM
virtualization is not enabled by default in Ubuntu kernels). A local
attacker in a guest VM could possibly use this to gain administrative
privileges in a host machine. (CVE-2018-16882)

Jann Horn discovered that the procfs file system implementation in the
Linux kernel did not properly restrict the ability to inspect the kernel
stack of an arbitrary task. A local attacker could use this to expose
sensitive information. (CVE-2018-17972)

Jann Horn discovered that the mremap() system call in the Linux kernel did
not properly flush the TLB when completing, potentially leaving access to a
physical page after it has been released to the page allocator. A local
attacker could use this to cause a denial of service (system crash), expose
sensitive information, or possibly execute arbitrary code. (CVE-2018-18281)

Wei Wu discovered that the KVM implementation in the Linux kernel did not
properly ensure that ioapics were initialized. A local attacker could use
this to cause a denial of service (system crash). (CVE-2018-19407)

It was discovered that the debug interface for the Linux kernel's HID
subsystem did not properly perform bounds checking in some situations. An
attacker with access to debugfs could use this to cause a denial of service
or possibly gain additional privileges. (CVE-2018-9516)

Update instructions:

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

Ubuntu 18.04 LTS:
linux-image-4.15.0-1027-gcp 4.15.0-1027.28
linux-image-4.15.0-1029-kvm 4.15.0-1029.29
linux-image-4.15.0-1031-raspi2 4.15.0-1031.33
linux-image-4.15.0-1032-aws 4.15.0-1032.34
linux-image-4.15.0-1033-oem 4.15.0-1033.38
linux-image-aws 4.15.0.1032.31
linux-image-gcp 4.15.0.1027.29
linux-image-gke 4.15.0.1027.29
linux-image-kvm 4.15.0.1029.29
linux-image-oem 4.15.0.1033.38
linux-image-raspi2 4.15.0.1031.29

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/usn/usn-3871-3
https://usn.ubuntu.com/usn/usn-3871-1
CVE-2018-10876, CVE-2018-10877, CVE-2018-10878, CVE-2018-10879,
CVE-2018-10880, CVE-2018-10882, CVE-2018-10883, CVE-2018-14625,
CVE-2018-16882, CVE-2018-17972, CVE-2018-18281, CVE-2018-19407,
CVE-2018-9516

Package Information:
https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1032.34
https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1027.28
https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1029.29
https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1033.38
https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1031.33

USN-3871-4: Linux kernel (HWE) vulnerabilities

=========================================================================
Ubuntu Security Notice USN-3871-4
February 04, 2019

linux-hwe, linux-aws-hwe, linux-gcp vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe: Linux hardware enablement (HWE) kernel

Details:

USN-3871-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 18.04 LTS for Ubuntu
16.04 LTS.

Wen Xu discovered that a use-after-free vulnerability existed in the ext4
filesystem implementation in the Linux kernel. An attacker could use this
to construct a malicious ext4 image that, when mounted, could cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2018-10876, CVE-2018-10879)

Wen Xu discovered that a buffer overflow existed in the ext4 filesystem
implementation in the Linux kernel. An attacker could use this to construct
a malicious ext4 image that, when mounted, could cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2018-10877)

Wen Xu discovered that an out-of-bounds write vulnerability existed in the
ext4 filesystem implementation in the Linux kernel. An attacker could use
this to construct a malicious ext4 image that, when mounted, could cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2018-10878, CVE-2018-10882)

Wen Xu discovered that the ext4 filesystem implementation in the Linux
kernel did not properly ensure that xattr information remained in inode
bodies. An attacker could use this to construct a malicious ext4 image
that, when mounted, could cause a denial of service (system crash).
(CVE-2018-10880)

Wen Xu discovered that the ext4 file system implementation in the Linux
kernel could possibly perform an out of bounds write when updating the
journal for an inline file. An attacker could use this to construct a
malicious ext4 image that, when mounted, could cause a denial of service
(system crash). (CVE-2018-10883)

It was discovered that a race condition existed in the vsock address family
implementation of the Linux kernel that could lead to a use-after-free
condition. A local attacker in a guest virtual machine could use this to
expose sensitive information (host machine kernel memory). (CVE-2018-14625)

Cfir Cohen discovered that a use-after-free vulnerability existed in the
KVM implementation of the Linux kernel, when handling interrupts in
environments where nested virtualization is in use (nested KVM
virtualization is not enabled by default in Ubuntu kernels). A local
attacker in a guest VM could possibly use this to gain administrative
privileges in a host machine. (CVE-2018-16882)

Jann Horn discovered that the procfs file system implementation in the
Linux kernel did not properly restrict the ability to inspect the kernel
stack of an arbitrary task. A local attacker could use this to expose
sensitive information. (CVE-2018-17972)

Jann Horn discovered that the mremap() system call in the Linux kernel did
not properly flush the TLB when completing, potentially leaving access to a
physical page after it has been released to the page allocator. A local
attacker could use this to cause a denial of service (system crash), expose
sensitive information, or possibly execute arbitrary code. (CVE-2018-18281)

Wei Wu discovered that the KVM implementation in the Linux kernel did not
properly ensure that ioapics were initialized. A local attacker could use
this to cause a denial of service (system crash). (CVE-2018-19407)

It was discovered that the debug interface for the Linux kernel's HID
subsystem did not properly perform bounds checking in some situations. An
attacker with access to debugfs could use this to cause a denial of service
or possibly gain additional privileges. (CVE-2018-9516)

Update instructions:

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

Ubuntu 16.04 LTS:
linux-image-4.15.0-1027-gcp 4.15.0-1027.28~16.04.1
linux-image-4.15.0-1032-aws 4.15.0-1032.34~16.04.1
linux-image-4.15.0-45-generic 4.15.0-45.48~16.04.1
linux-image-4.15.0-45-generic-lpae 4.15.0-45.48~16.04.1
linux-image-4.15.0-45-lowlatency 4.15.0-45.48~16.04.1
linux-image-aws-hwe 4.15.0.1032.33
linux-image-gcp 4.15.0.1027.41
linux-image-generic-hwe-16.04 4.15.0.45.66
linux-image-generic-lpae-hwe-16.04 4.15.0.45.66
linux-image-gke 4.15.0.1027.41
linux-image-lowlatency-hwe-16.04 4.15.0.45.66
linux-image-oem 4.15.0.45.66
linux-image-virtual-hwe-16.04 4.15.0.45.66

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/usn/usn-3871-4
https://usn.ubuntu.com/usn/usn-3871-1
CVE-2018-10876, CVE-2018-10877, CVE-2018-10878, CVE-2018-10879,
CVE-2018-10880, CVE-2018-10882, CVE-2018-10883, CVE-2018-14625,
CVE-2018-16882, CVE-2018-17972, CVE-2018-18281, CVE-2018-19407,
CVE-2018-9516

Package Information:
https://launchpad.net/ubuntu/+source/linux-aws-hwe/4.15.0-1032.34~16.04.1
https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1027.28~16.04.1
https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-45.48~16.04.1

USN-3878-1: Linux kernel vulnerabilities

=========================================================================
Ubuntu Security Notice USN-3878-1
February 04, 2019

linux, linux-aws, linux-gcp, linux-kvm, linux-raspi2 vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.10

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-raspi2: Linux kernel for Raspberry Pi 2

Details:

It was discovered that a race condition existed in the vsock address family
implementation of the Linux kernel that could lead to a use-after-free
condition. A local attacker in a guest virtual machine could use this to
expose sensitive information (host machine kernel memory). (CVE-2018-14625)

Cfir Cohen discovered that a use-after-free vulnerability existed in the
KVM implementation of the Linux kernel, when handling interrupts in
environments where nested virtualization is in use (nested KVM
virtualization is not enabled by default in Ubuntu kernels). A local
attacker in a guest VM could possibly use this to gain administrative
privileges in a host machine. (CVE-2018-16882)

Wei Wu discovered that the KVM implementation in the Linux kernel did not
properly ensure that ioapics were initialized. A local attacker could use
this to cause a denial of service (system crash). (CVE-2018-19407)

It was discovered that the crypto subsystem of the Linux kernel leaked
uninitialized memory to user space in some situations. A local attacker
could use this to expose sensitive information (kernel memory).
(CVE-2018-19854)

Update instructions:

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

Ubuntu 18.10:
linux-image-4.18.0-1006-gcp 4.18.0-1006.7
linux-image-4.18.0-1007-kvm 4.18.0-1007.7
linux-image-4.18.0-1008-aws 4.18.0-1008.10
linux-image-4.18.0-1009-raspi2 4.18.0-1009.11
linux-image-4.18.0-14-generic 4.18.0-14.15
linux-image-4.18.0-14-generic-lpae 4.18.0-14.15
linux-image-4.18.0-14-lowlatency 4.18.0-14.15
linux-image-4.18.0-14-snapdragon 4.18.0-14.15
linux-image-aws 4.18.0.1008.8
linux-image-gcp 4.18.0.1006.6
linux-image-generic 4.18.0.14.15
linux-image-generic-lpae 4.18.0.14.15
linux-image-gke 4.18.0.1006.6
linux-image-kvm 4.18.0.1007.7
linux-image-lowlatency 4.18.0.14.15
linux-image-raspi2 4.18.0.1009.6
linux-image-snapdragon 4.18.0.14.15

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/usn/usn-3878-1
CVE-2018-14625, CVE-2018-16882, CVE-2018-19407, CVE-2018-19854

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.18.0-14.15
https://launchpad.net/ubuntu/+source/linux-aws/4.18.0-1008.10
https://launchpad.net/ubuntu/+source/linux-gcp/4.18.0-1006.7
https://launchpad.net/ubuntu/+source/linux-kvm/4.18.0-1007.7
https://launchpad.net/ubuntu/+source/linux-raspi2/4.18.0-1009.11

USN-3879-1: Linux kernel vulnerabilities

=========================================================================
Ubuntu Security Notice USN-3879-1
February 04, 2019

linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 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-kvm: Linux kernel for cloud environments
- linux-raspi2: Linux kernel for Raspberry Pi 2
- linux-snapdragon: Linux kernel for Snapdragon processors

Details:

Wen Xu discovered that the ext4 file system implementation in the Linux
kernel could possibly perform an out of bounds write when updating the
journal for an inline file. An attacker could use this to construct a
malicious ext4 image that, when mounted, could cause a denial of service
(system crash). (CVE-2018-10883)

Vasily Averin and Pavel Tikhomirov discovered that the cleancache subsystem
of the Linux kernel did not properly initialize new files in some
situations. A local attacker could use this to expose sensitive
information. (CVE-2018-16862)

Wei Wu discovered that the KVM implementation in the Linux kernel did not
properly ensure that ioapics were initialized. A local attacker could use
this to cause a denial of service (system crash). (CVE-2018-19407)

Mathias Payer and Hui Peng discovered a use-after-free vulnerability in the
Advanced Linux Sound Architecture (ALSA) subsystem. A physically proximate
attacker could use this to cause a denial of service (system crash).
(CVE-2018-19824)

Hui Peng and Mathias Payer discovered that the USB subsystem in the Linux
kernel did not properly handle size checks when handling an extra USB
descriptor. A physically proximate attacker could use this to cause a
denial of service (system crash). (CVE-2018-20169)

Update instructions:

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

Ubuntu 16.04 LTS:
linux-image-4.4.0-1040-kvm 4.4.0-1040.46
linux-image-4.4.0-1075-aws 4.4.0-1075.85
linux-image-4.4.0-1103-raspi2 4.4.0-1103.111
linux-image-4.4.0-1107-snapdragon 4.4.0-1107.112
linux-image-4.4.0-142-generic 4.4.0-142.168
linux-image-4.4.0-142-generic-lpae 4.4.0-142.168
linux-image-4.4.0-142-lowlatency 4.4.0-142.168
linux-image-4.4.0-142-powerpc-e500mc 4.4.0-142.168
linux-image-4.4.0-142-powerpc-smp 4.4.0-142.168
linux-image-4.4.0-142-powerpc64-emb 4.4.0-142.168
linux-image-4.4.0-142-powerpc64-smp 4.4.0-142.168
linux-image-aws 4.4.0.1075.77
linux-image-generic 4.4.0.142.148
linux-image-generic-lpae 4.4.0.142.148
linux-image-kvm 4.4.0.1040.39
linux-image-lowlatency 4.4.0.142.148
linux-image-powerpc-e500mc 4.4.0.142.148
linux-image-powerpc-smp 4.4.0.142.148
linux-image-powerpc64-emb 4.4.0.142.148
linux-image-powerpc64-smp 4.4.0.142.148
linux-image-raspi2 4.4.0.1103.103
linux-image-snapdragon 4.4.0.1107.99

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/usn/usn-3879-1
CVE-2018-10883, CVE-2018-16862, CVE-2018-19407, CVE-2018-19824,
CVE-2018-20169

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.4.0-142.168
https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1075.85
https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1040.46
https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1103.111
https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1107.112


--3ecMC0kzqsE2ddMN
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USN-3879-2: Linux kernel (Xenial HWE) vulnerabilities

--BWWlCdgt6QLN7tv3
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline

=========================================================================Ubuntu Security Notice USN-3879-2
February 04, 2019

linux-lts-xenial, linux-aws vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

Details:

USN-3879-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
14.04 LTS.

Wen Xu discovered that the ext4 file system implementation in the Linux
kernel could possibly perform an out of bounds write when updating the
journal for an inline file. An attacker could use this to construct a
malicious ext4 image that, when mounted, could cause a denial of service
(system crash). (CVE-2018-10883)

Vasily Averin and Pavel Tikhomirov discovered that the cleancache subsystem
of the Linux kernel did not properly initialize new files in some
situations. A local attacker could use this to expose sensitive
information. (CVE-2018-16862)

Wei Wu discovered that the KVM implementation in the Linux kernel did not
properly ensure that ioapics were initialized. A local attacker could use
this to cause a denial of service (system crash). (CVE-2018-19407)

Mathias Payer and Hui Peng discovered a use-after-free vulnerability in the
Advanced Linux Sound Architecture (ALSA) subsystem. A physically proximate
attacker could use this to cause a denial of service (system crash).
(CVE-2018-19824)

Hui Peng and Mathias Payer discovered that the USB subsystem in the Linux
kernel did not properly handle size checks when handling an extra USB
descriptor. A physically proximate attacker could use this to cause a
denial of service (system crash). (CVE-2018-20169)

Update instructions:

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

Ubuntu 14.04 LTS:
linux-image-4.4.0-1038-aws 4.4.0-1038.41
linux-image-4.4.0-142-generic 4.4.0-142.168~14.04.1
linux-image-4.4.0-142-generic-lpae 4.4.0-142.168~14.04.1
linux-image-4.4.0-142-lowlatency 4.4.0-142.168~14.04.1
linux-image-4.4.0-142-powerpc-e500mc 4.4.0-142.168~14.04.1
linux-image-4.4.0-142-powerpc-smp 4.4.0-142.168~14.04.1
linux-image-4.4.0-142-powerpc64-emb 4.4.0-142.168~14.04.1
linux-image-4.4.0-142-powerpc64-smp 4.4.0-142.168~14.04.1
linux-image-aws 4.4.0.1038.38
linux-image-generic-lpae-lts-xenial 4.4.0.142.122
linux-image-generic-lts-xenial 4.4.0.142.122
linux-image-lowlatency-lts-xenial 4.4.0.142.122
linux-image-powerpc-e500mc-lts-xenial 4.4.0.142.122
linux-image-powerpc-smp-lts-xenial 4.4.0.142.122
linux-image-powerpc64-emb-lts-xenial 4.4.0.142.122
linux-image-powerpc64-smp-lts-xenial 4.4.0.142.122

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/usn/usn-3879-2
https://usn.ubuntu.com/usn/usn-3879-1
CVE-2018-10883, CVE-2018-16862, CVE-2018-19407, CVE-2018-19824,
CVE-2018-20169

Package Information:
https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1038.41
https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-142.168~14.04.1

USN-3880-1: Linux kernel vulnerabilities

=========================================================================
Ubuntu Security Notice USN-3880-1
February 04, 2019

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

- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel

Details:

It was discovered that the CIFS client implementation in the Linux kernel
did not properly handle setup negotiation during session recovery, leading
to a NULL pointer exception. An attacker could use this to create a
malicious CIFS server that caused a denial of service (client system
crash). (CVE-2018-1066)

Jann Horn discovered that the procfs file system implementation in the
Linux kernel did not properly restrict the ability to inspect the kernel
stack of an arbitrary task. A local attacker could use this to expose
sensitive information. (CVE-2018-17972)

Jann Horn discovered that the mremap() system call in the Linux kernel did
not properly flush the TLB when completing, potentially leaving access to a
physical page after it has been released to the page allocator. A local
attacker could use this to cause a denial of service (system crash), expose
sensitive information, or possibly execute arbitrary code. (CVE-2018-18281)

It was discovered that the socket implementation in the Linux kernel
contained a type confusion error that could lead to memory corruption. A
local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2018-9568)

Update instructions:

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

Ubuntu 14.04 LTS:
linux-image-3.13.0-165-generic 3.13.0-165.215
linux-image-3.13.0-165-generic-lpae 3.13.0-165.215
linux-image-3.13.0-165-lowlatency 3.13.0-165.215
linux-image-3.13.0-165-powerpc-e500 3.13.0-165.215
linux-image-3.13.0-165-powerpc-e500mc 3.13.0-165.215
linux-image-3.13.0-165-powerpc-smp 3.13.0-165.215
linux-image-3.13.0-165-powerpc64-emb 3.13.0-165.215
linux-image-3.13.0-165-powerpc64-smp 3.13.0-165.215
linux-image-generic 3.13.0.165.175
linux-image-generic-lpae 3.13.0.165.175
linux-image-lowlatency 3.13.0.165.175
linux-image-powerpc-e500 3.13.0.165.175
linux-image-powerpc-e500mc 3.13.0.165.175
linux-image-powerpc-smp 3.13.0.165.175
linux-image-powerpc64-emb 3.13.0.165.175
linux-image-powerpc64-smp 3.13.0.165.175

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/usn/usn-3880-1
CVE-2018-1066, CVE-2018-17972, CVE-2018-18281, CVE-2018-9568

Package Information:
https://launchpad.net/ubuntu/+source/linux/3.13.0-165.215

USN-3880-2: Linux kernel (Trusty HWE) vulnerabilities

=========================================================================
Ubuntu Security Notice USN-3880-2
February 04, 2019

linux-lts-trusty vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise ESM

Details:

USN-3880-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu
12.04 ESM.

It was discovered that the CIFS client implementation in the Linux kernel
did not properly handle setup negotiation during session recovery, leading
to a NULL pointer exception. An attacker could use this to create a
malicious CIFS server that caused a denial of service (client system
crash). (CVE-2018-1066)

Jann Horn discovered that the procfs file system implementation in the
Linux kernel did not properly restrict the ability to inspect the kernel
stack of an arbitrary task. A local attacker could use this to expose
sensitive information. (CVE-2018-17972)

Jann Horn discovered that the mremap() system call in the Linux kernel did
not properly flush the TLB when completing, potentially leaving access to a
physical page after it has been released to the page allocator. A local
attacker could use this to cause a denial of service (system crash), expose
sensitive information, or possibly execute arbitrary code. (CVE-2018-18281)

It was discovered that the socket implementation in the Linux kernel
contained a type confusion error that could lead to memory corruption. A
local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2018-9568)

Update instructions:

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

Ubuntu 12.04 ESM:
linux-image-3.13.0-165-generic 3.13.0-165.215~precise1
linux-image-3.13.0-165-generic-lpae 3.13.0-165.215~precise1
linux-image-generic-lpae-lts-trusty 3.13.0.165.155
linux-image-generic-lts-trusty 3.13.0.165.155

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/usn/usn-3880-2
https://usn.ubuntu.com/usn/usn-3880-1
CVE-2018-1066, CVE-2018-17972, CVE-2018-18281, CVE-2018-9568